@article{ author = {Nosraty, H. and Tehrani-Dehkordi, M. and Shokrieh, M. M. and Minak, G.}, title = {INTRAPLY HYBRID COMPOSITES BASED ON BASALT AND NYLON WOVEN FABRICS: TENSILE AND COMPRESSIVE PROPERTIES}, abstract ={In this study, the tensile and compressive behaviors of pure and hybrid composite laminates reinforced by basalt–nylon bi-woven intra-ply fabrics were experimentally investigated. Epoxy resin was used as the matrix material. The purpose of using this hybrid composite is to obtain superior characteristics by using the good strength property of basalt fiber with the excellent toughness of nylon fiber. Five different types of woven fabric were used as reinforcement with different volume percentages of nylon (0%, 25%, 33.3%, 50% and 100%). The effects of nylon/basalt fiber content on tensile and compressive parameters were studied. In addition, the after failure visual inspection and scanning electron microscopy (SEM) analysis was used to determine the extent and type of damage on tested specimens. The results indicate that the tensile and compressive performances of these composites are strongly affected by the nylon/basalt fiber content. Also, with a proper choice of fiber content, the nylon/basalt hybrid composites can achieve mechanical properties comparable with the pure ones. The stress–strain curves, after failure visual inspection and SEM analysis of tested specimens reveal that hybridization can prevent catastrophic and complete failure. In hybrid composites, the basalt and nylon fibers cannot reach their maximum strength at the same time and the progressive failure of the various fibers therefore occurred}, Keywords = {Intra-ply, Hybrid, Tensile, Compressive, Basalt, Nylo}, volume = {12}, Number = {1}, pages = {1-11}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.1.1}, url = {http://ijmse.iust.ac.ir/article-1-761-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-761-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Shahbazi, B. and Rezai, B. and ChehrehChelgani, S. and Koleini, S. M. J. and Noaparast, M.}, title = {ESTIMATION OF GAS HOLDUP AND INPUT POWER IN FROTH FLOTATION USING ARTIFICIAL NEURAL NETWORK}, abstract ={Multivariable regression and artificial neural network procedures were used to modeling of the input power and gas holdup of flotation. The stepwise nonlinear equations have shown greater accuracy than linear ones where they can predict input power, and gas holdup with the correlation coefficients of 0.79 thereby 0.51 in the linear, and R2=0.88 versus 0.52 in the non linear, respectively. For increasing accuracy of predictions, Feed-forward artificial neural network (FANN) was applied. FANNs with 2-2-5-5, and 2-2-3-2-2 arrangements, were capable to estimating of the input power and gas holdup, respectively. They were achieved quite satisfactory correlations of 0.96 in testing stage for input power prediction, and 0.64 for gas holdup prediction}, Keywords = {Flotation, Input Power, Gas Holdup, Regression, Artificial Neural Network}, volume = {12}, Number = {1}, pages = {12-19}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.1.12}, url = {http://ijmse.iust.ac.ir/article-1-762-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-762-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Behagh, A. M. and FadaeiTehrani, A. and SalimiJazi, H. R. and Behagh, O.}, title = {SIMULATION OF NICKEL ELECTROFORMING PROCESS OF A REVOLVING PART USING FINITE ELEMENT METHOD}, abstract ={n this paper a finite element model has been proposed for evaluation of primary and secondary current density values on the cathode surface in nickel electroplating operation of a revolving part. In addition, the capability of presented electroplating simulation has been investigated in order to describe the electroplated thickness of the nickel sulfate solution. Nickel electroplating experiments have been carried out. A good agreement between the simulated and experimental results was found. Also the results showed that primary current density can describe the general form of thickness distribution but the relative value of current density using secondary current density can present better description of thickness distribution}, Keywords = {Nickel electroforming, finite element simulation, Thickness distribution, Primary current density,}, volume = {12}, Number = {1}, pages = {20-27}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.1.20}, url = {http://ijmse.iust.ac.ir/article-1-763-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-763-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Shalchian, H. and Farbod, A. and Beygi, H. and Sajjadi, S. A.}, title = {COMBUSTION PERFORMANCE OF Ni-COATED AND UNCOATED HIGH ENERGETIC ALUMINUM NANOPARTICLES}, abstract ={High energetic aluminum nanoparticles are mainly used as additive in solid rocket propellants. However, fabrication of these aluminized energetic materials is associated with decreasing the burning rate of propellants due to problems such as oxidation and agglomeration of nanoparticles. In this study, to improve combustion performance of aluminum nanoparticles, coating by metallic Ni shell was studied. Nickel coating of aluminum nanoparticles was performed through electroless deposition (ED) subsequently, morphology and chemical composition of Ni-coated nanoparticles were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). These studies show that a uniform Ni layer with a thickness of 10nm is coated on the surface of Al nanoparticles. Thermal analysis of uncoated and Ni-coated aluminum nanoparticles was done using differential thermal analysis (DTA) and thermo gravimetric analysis (TGA). The results of thermal analysis indicate that, coating the aluminum particles by Ni, leads to improvement in combustion performance of aluminum nanoparticles through decreasing critical ignition temperature, ignition delay time of the nanoparticles and promoting the ignition by exothermic chemical reactions between Al and Ni}, Keywords = {Combustion mechanism, Aluminum nanoparticle, Electroless deposition, Electron microscopy}, volume = {12}, Number = {1}, pages = {28-34}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.1.28}, url = {http://ijmse.iust.ac.ir/article-1-764-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-764-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Siadat-Cheraghi, M. and Allahkaram, S. R. and Shahri, Z.}, title = {EFFECT OF CURRENT DENSITY ON MICROSTRUCTURE AND CORROSION BEHAVIOR OF PURE COBALT COATINGS OBTAINED}, abstract ={Pure cobalt coatings were electrodeposited on copper substrate by means of direct electric current in a chloride solution at different current densities in the range of 10-70 mA cm -2 . The surface morphology and microstructure were investigated via X-ray diffraction analysis and scanning electron microscopy. Corrosion behavior of cobalt coatings was also studied in a 3.5 wt% NaCl solution using potentiodynamic polarization and impedance spectroscopy techniques. The results showed that corrosion resistance of deposits was strongly influenced by the coating’s morphology. Co deposit obtained in lower current densities exhibited the highest corrosion resistance, due to their lower grain boundaries and so the least density of active sites for preferential corrosion attacks}, Keywords = {Cobalt, Corrosion, Surface morphology, Microstructure}, volume = {12}, Number = {1}, pages = {35-42}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.1.35}, url = {http://ijmse.iust.ac.ir/article-1-765-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-765-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Akbarzadeh, M. and Shafyei, A. and Salimijazi, H. R.}, title = {COMPARISON OF THE CrN , TiN AND (Ti, Cr)N PVD COATINGS DEPOSITED BY CATHODIC ARC EVAPORATION}, abstract ={In the present study, CrN, TiN and (Ti, Cr)N coatings were deposited on D6 tool steel substrates. Physical and mechanical properties of coatings such as microstructure, thickness, phase composition, and hardness were evaluated. Phase compositions were studies by X-ray diffraction method. Mechanical properties were determined by nano-indentation technique. The friction and wear behaviour of the coatings were investigated using ball-on-disc tests under normal loads of 5, 7 and 9 N at sliding distance of 500 m, at room temperature. Scanning electron microscope equipped with energy dispersive spectroscopy, optical microscope, and 2D/3D profilometry were utilized to investigate the microstructures and wear mechanisms. Wear test results clarified that the wear resistance of (Ti, Cr)N and TiN coatings was better than that of CrN coating. The wear resistance of the (Ti, Cr)N coatings was related to the Ti content in the coatings and reduced by decreasing the Ti content. The dominant wear mechanisms were characterized to be abrasive and tribochemical wear}, Keywords = {physical vapour deposition, thin films, wear resistance, Ti-Cr-N coating, characterization.}, volume = {12}, Number = {1}, pages = {43-51}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.1.43}, url = {http://ijmse.iust.ac.ir/article-1-766-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-766-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {ShabanGhazani, M. and Vajd, A. and Mosadeg, B.}, title = {PREDICTION OF CRITICAL STRESS AND STRAIN FOR THE ONSET OF DYNAMIC RECRYSTALLIZATION IN PLAIN CARBON STEELS}, abstract ={The aim of the present study is the prediction of critical conditions (including critical strain and flow stress) for the initiation of dynamic recrystallization during thermo-mechanical processing of plain carbon steels. For this propose, torsion tests were conducted at different temperature (1050, 1100 and 1150˚C) and strain rates (0.002, 0.02 and 0.2/s). All flow curves showed a peak stress indicating that dynamic recrystallization occurs during hot deformation. The critical stress and strain were then determined based on change in strain hardening rate as a function of flow stress. Finally, the effect of deformation conditions on these parameters was analyzed.}, Keywords = {Dynamic recrystallization, Critical stress, Critical strain, Low carbon steel.}, volume = {12}, Number = {1}, pages = {52-58}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.1.52}, url = {http://ijmse.iust.ac.ir/article-1-767-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-767-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Kianinia, Y. and Darban, A. K. and Taheri-Nassaj, E. and Rahnama, B. and Foroutan, A.}, title = {SYNTHESIS OF NANO SIZED MESOPOROUS γ - Al2O3POWDER FROM DOMESTIC HAMEDAN KAOLIN}, abstract ={A method for producing high surface area nano-sized mesoporous alumina from inexpensive Iranian kaolin as raw material is proposed. In this method, first, kaolin was purified for purifying Kaolin, High Grade Magnetic Separation and leaching with HCl and chemical bleaching treatment by using sodium dithionite (Na 2 S 2O4 ) as reducing agent in acidic media (H 2SO 4 ) were used. Purified kaolin was calcined. After that, Al (hydr) oxide from acid -leachates of calcined kaolin was precipitated with ammonia, in presence of polyethylene glycol. Finally, a white powder of nano-sized alumina particles was obtained after calcination. BET surface area, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM) were used to characterize the sample. The resulting alumina with relatively high surface area (201.53 m 2 g -1 ) and narrow mean pore diameter (6.91 nm), consists of a particle size distribution ranging from 22 to 36 nm.}, Keywords = {Nano- alumina, kaolin, Synthesis, precipitation}, volume = {12}, Number = {1}, pages = {59-65}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.1.59}, url = {http://ijmse.iust.ac.ir/article-1-768-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-768-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {HeydariNasab, M. and Naghizadeh, R. and Samadi, H. and Nemati, A.}, title = {ALUMINOTHERMIC-CARBOTHERMAL REDUCTION SYNTHESIS OF NANO CRYSTALLINE Al2O3-Ti(C,N) COMPOSITE WITH DIFFERENT BED TYPES}, abstract ={Ceramic-matrix composites containing TiC-TiN have been used in a variety of application because of their superior properties such as high hardness, good wear resistance and high chemical stability. In this research, effect of coke and coke/calcium beds in synthesis of Al 2O3-Ti(C, N) composites using alumino-carbothermic reduction of TiO 2 has been investigated. Al, TiO 2 and active carbon with additives of extra carbon and NaCl and without additives, in separate procedures, have been mixed. Afterwards, mixtures were pressed and synthesized in 1200oC for 4hrs, in coke and coke/calcium beds, separately. Al 2O3-Ti(C,N) composite was synthesized in ternary system of Al-TiO 2 -C with excess carbon and NaCl additives in calcium/coke bed in 1200 . X-ray diffraction patterns (XRD) results showed that existence of calcium in bed resulted in intensification of reduction atmosphere in samples and formation of Ti(C,N) phase enriched from carbon was accelerated. Crystallite sizes of synthesis Ti(C,N) at 1200 °C in reducing conditions were 22-28 nm.}, Keywords = {Alumino carbothermal reduction, Synthesis, Additives, Titanium carbonitride, Calcium/coke bed}, volume = {12}, Number = {1}, pages = {66-74}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.1.66}, url = {http://ijmse.iust.ac.ir/article-1-769-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-769-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Mote, V. and Dole, B.}, title = {CRYSTALLOGRAPHIC, MORPHOLOGICAL AND W-H MODELS INVESTIGATIONS ON Mn SUBSTITUTED ZnO NANOCRYSTALS}, abstract ={Mn doped ZnO nanocrystals were prepared by co-precipitation route sintered at 450 °C temperature. XRD results indicate that the samples having hexagonal (wurtzite) structure. From X-ray data it is found that the lattice parameters increase with increasing Mn concentration. The X-ray density decreases with increasing Mn concentration of Zn 1-x Mnx O nanocrystals. It indicates that the Mn ions go into the Zn site in the ZnO lattice structure. TEM results reveal that the pure and Mn substituted ZnO samples are spherical in shape with average particle size about 20-60 nm. The crystalline size and lattice strain were evaluated by Williamson-Hall (W-H) analysis using X-ray peak broadening data. All other relevant physical parameters such as strain, stress and energy density were calculated by the different models Viz, uniform deformation model (UDM), uniform deformation stress model (UDSM) and Uniform deformation energy density model (UDEDM) considering the Williamson-Hall analysis. These models reveal different strain values it may be due to the anisotropic nature of the material. It is found that the mean particle size of Zn 1-x MnxO nanoparticles was estimated from TEM analysis, Scherrer’s formula & W-H analysis is highly comparable}, Keywords = {Nanocrystals, Co-precipitation route, TEM, UDEDM}, volume = {12}, Number = {1}, pages = {75-88}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.1.75}, url = {http://ijmse.iust.ac.ir/article-1-770-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-770-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Ghiami, Z. and Mirkazemi, S. M. and Alamolhoda, S.}, title = {THE EFFECT OF CTAB SURFACTANT ADDITION AND ADDITIONAL Sr ON PHASE FORMATION AND MAGNETIC PROPERTIES OF NANOSIZED SrFe12O19 SYNTHESIZED VIA SOL-GEL AUTO- COMBUSTION METHOD}, abstract ={trontium hexaferrite (SrFe 12 O 19 ) nanosized powders were synthesized by sol-gel auto-combustion method with and without cetyltrimethylammonium boromide (CTAB) addition in the sol with Fe/Sr ratio of 11 (using additional Sr). The resultant powders were investigated by X-ray Diffraction (XRD), Transmission Electron Microscope (TEM), Field Emission Scanning Electron Microscope (FESEM) and Vibration Sample Magnetometer (VSM) techniques. Phase constituents of the synthesized samples which were heat treated at temperatures in the range of 700- 900 ◦C were studied. XRD results revealed that CTAB addition facilitates the formation of single phase strontium hexaferrite at 800 ◦C. Microstructural evaluations with FESEM represented that CTAB addition causes formation of larger particles with a narrower size distribution. VSM results represented that the highest amount of intrinsic coercivity force ( i H C ) was obtained in the sample without CTAB addition and with additional Sr, calcined at 800 ◦C for 1 h which was equal to 5749.21 Oe, while the value of i H C was equal to 4950.89 Oe without additional Sr. The amount of maximum magnetization (M max ) was raised from 48.41 emu/g to 62.60 emu/g using CTAB and additional Sr. The microstructure and magnetic properties of the samples have been explained}, Keywords = {Strontium hexaferrite, sol-gel auto-combustion, surfactant, magnetic properties}, volume = {12}, Number = {2}, pages = {1-9}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.2.1}, url = {http://ijmse.iust.ac.ir/article-1-797-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-797-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Fattah-Alhosseini, A. and Ranjbaran, M. and VajdiVahid, S.}, title = {AN INVESTIGATION ON CORROSION BEHAVIOUR OF A356-10 VOL.% SiC COMPOSITES IN HCl SOLUTIONS}, abstract ={In this study, corrosion behaviour of A356-10 vol.% SiC composites casted by gravity and squeeze casting is evaluated. For this purpose, prepared samples were immersed in HCl solution for 1h at open circuit potential. Tafel polarization and electrochemical impedance spectroscopy (EIS) were carried out to study the corrosion resistance of composites. The Tafel polarization and EIS studies of the corrosion behaviour of the A356-10 vol.% SiC composites showed that the corrosion resistance of the composite casted by squeeze casting was higher than that of the composites casted by gravity in selected corrosion media. Also, the Tafel polarization and EIS studies revealed that the corrosion current densities of both composites increase with the increase in the concentration of HCl. The micrographs of scanning electron microscope (SEM) clearly showed the squeeze casting composite exhibits a good dispersion/matrix interface compared to that of the composites produced by gravity casting}, Keywords = {Composite, Corrosion, Gravity casting, Squeeze casting, Polarization}, volume = {12}, Number = {2}, pages = {10-17}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.2.10}, url = {http://ijmse.iust.ac.ir/article-1-798-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-798-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Abbas, M. and Nisar, S. and Shah, A. and ImtiazKhan, F.}, title = {EFFECT OF T6 HEAT TREATMENT ON MECHANICAL PROPERTIES OF CERAMIC REINFORCED CASTED ALUMINUM ALLOY}, abstract ={Aluminium base alloy (Al-Cu-Si) was reinforced with silicon carbide (SiC) particles, in various percentage compositions from 0-20 wt%. Silicon carbide particle size of 20µm was selected. The molten slurry of SiC reinforced base aluminium metal was casted through green and dry sand casting methods and solidification process was carried out under ambient conditions. A selected population of total casted samples were subjected to T6 heat treatment process, followed by evaluation of mechanical properties of hardness, tensile strength and impact loading. The micro sized SiC particles were preheated up to 300C prior pouring into the melted metal, for subsequent removal of residual gases and moisture content. A continuous manual stirring method was used for homogenous distribution of reinforced particle in molten slurry. The experimental results revealed that the highest parameters of hardness, impact energy and tensile strength were achieved in the T6 heat treated specimens having highest percentage composition (20%) of Silicon Carbide (SiC) particles}, Keywords = {Aluminium Base Alloy (Al-Cu-Si), Silicon Carbide (SiC), Particle reinforced metal matrix composite}, volume = {12}, Number = {2}, pages = {18-25}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.2.18}, url = {http://ijmse.iust.ac.ir/article-1-799-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-799-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Yazdani, A. and Zakeri, R.}, title = {FEASIBILITY OF PRODUCING NANO STRUCTURED METALLIC AND NON-METALLIC COATINGS ON Al SUBSTRATE USING MECHANICAL COATING ROUTE}, abstract ={In this paper, the possibility of mechanical coating of aluminum with either Ni or SiC using planetary ball mill was studied. The Al substrate was fixed inside of the vial lid of a planetary ball mill filled with milling balls and starting powder. The phase analysis and crystallite size measurement of the coatings were carried out using X-ray diffraction (XRD) method. Scanning electron microscope (SEM) was employed to study the coating/substrate interface and coating thickness. Hardness and wear resistance of coatings were also measured. The results indicated that all coatings have relatively uniform thickness. SiC coating shows poor compaction and adhesion to the Al, while nanostructured Ni coating is well-bonded to the substrate. Moreover, Ni coating showed higher hardness and wear resistance compared to SiC coating. It was found that the balls collision will result in the grain refinement of the coating as well as Al substrate. Mechanically deposited Ni coating shows higher hardness value compared to those obtained by conventional methods. This has been related to the induced grain refinement phenomenon.}, Keywords = {Mechanical coating, planetary ball mill, Hardness, Ni and SiC coatings}, volume = {12}, Number = {2}, pages = {26-33}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.2.26}, url = {http://ijmse.iust.ac.ir/article-1-800-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-800-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Dahdele, J. and Danaee, I. and Rashed, G. H. and Rashvandavei, M.}, title = {CORROSION INHIBITION BEHAVIOR OF N,N′-BIS(2,4,6-TRIHYDROXYACETOPHENONE)-PROPANDIIMINE ON ST44.0 STEEL IN ALKALINE NACL SOLUTION}, abstract ={The inhibition behavior of N,N′-bis(2,4,6-trihydroxyacetophenone)-propandiimine (THAPP) as an environmentally friendly Salen Ligand on the corrosion inhibition of mild steel was studied in alkaline solution (pH=10) containing 3% NaCl. Measurements were carried out using electrochemical and surface techniques. The experimental results suggested that this compound was an effective corrosion inhibitor for mild steel and the protection efficiency was increased with the increase in inhibitor concentration. Polarization curves indicated that this organic compound was a mixed-type inhibitor. Adsorption on the mild steel surface follows the Langmuir isotherm model. Activation parameters and thermodynamic adsorption parameters of the corrosion process such as E a , ΔH, ΔS, K ads , and ΔG ads were calculated by the obtained corrosion currents at different temperatures}, Keywords = {Corrosion, Inhibitor, adsorption isotherm, Langmuir.}, volume = {12}, Number = {2}, pages = {34-46}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.2.34}, url = {http://ijmse.iust.ac.ir/article-1-801-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-801-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Shafiei, S. M. M. and Divandari, M. and Boutorabi, S. M. A. and Naghizadeh,}, title = {COMPARISON OF PROPERTIES OF TiN/TiCN AND PLASMA NITRIDING/TiCN FILMS DEPOSITED ON THE TOOL STEEL BY PULSED DC- PACVD}, abstract ={In this work, TiN/TiCN & PN/TiCN multilayer films were deposited by plasma- assisted chemical vapour deposition (PACVD). Plasma nitriding (PN) and TiN intermediate layer prior to coating leads to appropriate hardness gradient and it can greatly improve the mechanical properties of the coating. The composition, crystalline structure and phase of the films were investigated by X-ray diffraction. Atomic force microscopy and scanning electron microscopy were employed to observe the morphology and structure of the films. The TiCN layer exhibited a columnar structure. The adhesion force between the film and the tool steel substrate was 30.8 MPa for TiN/TiCN and 25.4 MPa for PN/TiCN film determined by pull off tests. The hardness of TiN/TiCN film was 12.75 GPa while it was 5.4 GPa for PN/TiCN film, respectively. The improvement of the adhesion in TiN/TiCN was attributed to a less gradient hardness configuration. In addition, the mean friction coefficients of the films were about 0.2 for TiN/TiCN and 0.3 for PN/TiCN film determined by nanoindentation tests.}, Keywords = {PACVD, TiCN, TiN, Plasma nitriding, Multilayer}, volume = {12}, Number = {2}, pages = {47-55}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.2.47}, url = {http://ijmse.iust.ac.ir/article-1-802-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-802-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Niksirat, S. and Raygan, SH. and MoradiGhiassabadi, S.}, title = {MECHANO-THERMAL REDUCTION OF HEMATITE AND ANATASE MIXTURE BY TWO DIFFERENT FORMS OF CARBON AS REDUCTANT FOR IN-SITU PRODUCTION OF Fe-T iC - NANO CRYSTALLINE COMPOSITE}, abstract ={In this research, two different carbonaceous materials (Graphite:G and Petrocoke:P) were separately compared in terms of the carbothermic reduction of hematite and anatase in order to synthesize Fe-TiC nanocrystalline composite by mechanically activated sintering method. Powders were activated in a planetary high-energy ball mill under argon atmosphere for 0, 2, 5, 10,and 20 h. Then, the activated powders were analyzed by XRD and SEM to investigate phase constituents and microstructure of the mixtures. Results proved that Fe 2 O 3 and TiO 2 were not reduced by carbonaceous materials even after 20h of milling. SEM investigations showed that G-mixture was more homogenous than P-mixture after 20h of milling, meaning that graphite-anatase-hematite was mixed satisfactorily. Thermogravimetry analysis was done on 0 and 20h milled powders. TG and DTG curves showed that mechanical activation led to almost 300°C decrease in the reduction temperature of hematite and anatase in both mixtures. In the next step, the powders were sintered in a tube furnace under argon atmosphere. In the G-mixture, anatase was reduced to titanium carbide at 1100°C but, in the P-mixture, temperature of 1200°C was essential for completely reducing anatase to titanium carbide.Results of phase identification of the sintered powders showed that anano-crystalline ironbased composite with titanium carbide, as the reinforcement was successfully synthesized after 20 h high-energy milling of the initial powders and subsequent sintering occurred at 1200˚C for 1h}, Keywords = {Mechanical Activation, Heat Treatment, Fe-TiC, Nano-crystalline Composite, Petrocoke, Graphite.}, volume = {12}, Number = {2}, pages = {56-70}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.2.56}, url = {http://ijmse.iust.ac.ir/article-1-803-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-803-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Khaleghian, M. and Kalantar, M. and Ghasemi, S. S.}, title = {COMPARISON OF MECHANICAL AND ELECTRICAL PROPERTIES OF PIEZOELECTRIC COMPOSITES PZT/ZnO AND PZT/Al FABRICATED BY POWDER METALLURGY}, abstract ={Lead zirconate titanate (PZT) as a piezoelectric ceramic has been used widely in the fields of electronics, biomedical engineering, mechatronics and thermoelectric. Although, the electrical properties of PZT ceramics is a major considerable, but the mechanical properties such as fracture strength and toughness should be improved for many applications. In this study, lead monoxide, zirconium dioxide and titanium dioxide were used to synthesize PZT compound with chemical formula Pb(Zr 0.52 ,Ti 0.48 )O 3 by calcination heat treatment. Planetary mill with zirconia balls were used for homogenization of materials. Two-stage calcination was performed at temperatures of 600˚C and 850˚C for holding time of 2h. In order to improve the mechanical properties of PZT, various amount of ZnO and/or Al 2 O 3 particles were added to calcined materials and so PZT/ZnO, PZT/Al 2 O 3 and PZT/ZnO+Al 2 O 3 composites were fabricated. Composites samples were sintered at 1100˚C for 2 h in the normal atmosphere. Microstructural component and phase composition were analyzed by XRD and SEM. The density, fracture strength, toughness and hardness were measured by Archimedes method, three-point bending, direct measurement length crack and Vickers method, respectively. Dielectric and piezoelectric properties of the samples were also measured by LCR meter and d33metet tester, respectively. The results showed that by addition of ZnO and Al 2 O 3 to composite materials, the relative density of PZT based composites was increased in conjunction with a signification improvement of mechanical properties such as flexural strength, toughness and hardness. Moreover, the dielectric and piezoelectric properties of PZT such as dielectric constant, piezoelectric coefficient and coupling factor were decreased while the loss tangent was also increased.}, Keywords = {Al2O3 + ZnO/PZT composites, powder metallurgy, mechanical properties, phase composition}, volume = {12}, Number = {2}, pages = {71-82}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.2.71}, url = {http://ijmse.iust.ac.ir/article-1-804-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-804-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Ahmadi, S. and Shahverdi, H. R.}, title = {A DETAILED STUDY TOWARD THE NANO -CRYSTALLIZATION OF α – Fe IN Fe55-X Cr18Mo7B16C4 BULK AMORPHOUS ALLOY}, abstract ={Crystallization of α – Fe phase during annealing process of Fe55Cr18Mo7B16C4 bulk amorphous alloy has been evaluated by X- ray diffraction, differential scanning calorimetric tests and TEM observations in this research. In effect, crystallization mechanism and activation energy of crystallization were evaluated using DSC tests in four different heating rates (10, 20, 30, 40 K/min). A two -step crystallization process was observed in the alloy in which α–Fe phases was crystallized in the first step after annealing process. Activation energy for the first step of crystallization process (i.e. α – Fe phase) was measured to be 276 (Kj/mole) according to Kissinger kinetic model. Furthermore, Avrami exponent calculated from DSC curves was two and a three -dimensional diffusion controlled mechanism with decreasing nucleation rate was observed in the alloy. It is also known from the TEM observations that crystalline α – Fe phase nucleated in the structure of the alloy in an average size of 10 nm and completely mottled morphology}, Keywords = {Bulk Metallic Glasses (BMGs), Kissinger model, morphology, Crystallization}, volume = {12}, Number = {2}, pages = {83-90}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.2.83}, url = {http://ijmse.iust.ac.ir/article-1-805-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-805-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Noori, S. and Khalil-Allafi, J.}, title = {EFFECT OF ANODIC OXIDATION ON THE CORROSION BEHAVIOR OF NICKEL-TITANIUM SHAPE MEMORY ALLOYS IN SIMULATED BODY FLUIDS (SBF)}, abstract ={The effect of anodic oxidation of a NiTi shape memory alloy in sulfuric acid electrolyte on its surface characteristics was studied. Surface roughness was measured by roughness tester. Surface morphology was studied using optical microscopy (OM) and scanning electron microscopy (SEM). Corrosion behavior was specified by recording Potentiodynamic polarization curves and measuring the content of Ni ions, released into a SBF solution using atomic absorption spectroscopy (AAS). Fourier transformation infrared radiation (FT-IR) and energy dispersive spectroscopy were employed to verify the biocompatibility of the anodized and bare alloys after submersion in SBF. It was shown that anodic oxidation in sulfuric acid significantly increases corrosion resistance and biocompatibility. This layer improves corrosion resistance and Ni ion-release resistance by impeding the direct contact of the alloy with the corrosion mediums i.e. Ringer and SBF solutions. The TiO2 oxide layer also decreases the releasing of Ni ions in to SBF solution}, Keywords = {NiTi, oxidation, corrosion resistance, biocompatibility, Ni release.}, volume = {12}, Number = {2}, pages = {91-100}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.2.91}, url = {http://ijmse.iust.ac.ir/article-1-806-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-806-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Gharailou, D. and Abbasi, A.}, title = {CORRELATION BETWEEN CRYSTAL ORIENTATION AND NANOGAP FORMED BY ELECTRO MIGRATION}, abstract ={Effect of electro migration on crystal structures of platinum nanowire (Nano bridge) during Nano-gap formation is investigated by means of Transmission Electron Microscopy (TEM). Selected area diffraction patterns as well as bright field images are used for this investigation. There were severely recessions in the polycrystalline Nano bridge and crystal structures around the nanogap changed completely during electro migration. Due to Joule heating, original small crystal with random orientation disappeared and newly crystals with a preferred orientation grew. They have [111] orientations (respect to beam direction) with slight misorientations. α and θ was defined to calculate the misorientation and used to represent Nano-gap formation mechanism. The calculation gives the breaking of Nano bridge occurred along grain boundaries in most of Nano bridges. The controlling system during eletromigration may affect on the shapes of tips so that the shape of tips in Nano bridges, in which feedback control is applied, is more symmetric than others. The effect of temperature on atomic diffusivity might be the reason of the behaviour. {422} could be a preferred surface plane for mass transport in platinum Nano bridge in which atoms move along it}, Keywords = {Electro migration, Nano-gap, platinum, crystal orientation, Transmission Electron Microscopy,}, volume = {12}, Number = {3}, pages = {1-13}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.3.1}, url = {http://ijmse.iust.ac.ir/article-1-825-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-825-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Salimi, A. and Özdemir, A. and Erdem, A.}, title = {SIMULATION AND MONITORING OF THE MACHINING PROCESS VIA FUZZY LOGIC AND CUTTING FORCES}, abstract ={On time replacement of a cutting tool with a new one is an important task in Flexible Manufacturing Systems (FMS). A fuzzy logic-based approach was used in the present study to predict and simulate the tool wear progress in turning operation. Cutting parameters and cutting forces were considered as the input and the wear rate was regarded as the output data in the fuzzy logic for constructing the system. Flank wear was used as the tool life criterion and the wear ranges were selected between 0 and 0, 3 based on ISO 3685 standard for new and worn tool respectively. For conducting the tests, Taghuchi method was used to design an experimental table. The results of the measurements and estimates confirmed the reliability of the fuzzy logic method for estimating tool wear. One significant feature of the proposed system is that it can predict the wear rate on-line by transferring the cutting force signals from the sensor to the fuzzy logic simulation box.}, Keywords = {Tool condition monitoring, cutting forces, fuzzy logic, simulation}, volume = {12}, Number = {3}, pages = {14-26}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.3.2}, url = {http://ijmse.iust.ac.ir/article-1-826-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-826-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Nazemi, H. and Ehteshamzadeh, M.}, title = {AN INVESTIGATION ON FATIGUE AND FATIGUE CORROSION BEHAVIOR OF Cr-Si SPRING STEEL AFTER Zn-Ni ELECTROPLATING USING WEIBULL STATISTICAL MODEL}, abstract ={Compression springs were prepared from Cr-Si high strength spring steel and coated with pure Zn and ZnNi by electroplating process. The effect of baking after electroplating as well as applying an electroless nickel interlayer on the fatigue and fatigue corrosion of the springs was investigated. The results were analyzed using weibull statistical model. A considerable improvement (8%) in fatigue life of the electroplated springs with Zn-Ni was observed in the presence of Ni interlayer. In addition, baking of these electroplated springs improved fatigue life by 4%. The fatigue life under salt spraying conditions, however, has demonstrated remarkable reduction by 40%, 34% and 30% for Zn-Ni plating, backed and unbaked Zn-Ni plating containing Ni interlayer, respectively}, Keywords = {Cr-Si spring steel, Zn-Ni alloy electroplating, Fatigue, Fatigue corrosion}, volume = {12}, Number = {3}, pages = {27-37}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.3.3}, url = {http://ijmse.iust.ac.ir/article-1-827-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-827-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Mohammadpour, A. and Mirkazemi, S. M. and Beitollahi, A.}, title = {PREPARATION OF Fe/GLASS COMPOSITE BY REDUCTION OF Na2O– Fe2O3–B2O3–SiO2–ZnO GLASS AND GLASS CERAMICS}, abstract ={In the present study, the feasibility of α-Fe ferromagnetic phase formation in glass and glass-ceramic by reduction in hydrogen atmosphere have been investigated. The glass with the composition of 35Na 2 O–24Fe2O3–20B 2O3 – 20SiO 2 –1ZnO (mol %) was melted and quenched by using a twin roller technique. As quenched glass flakes were heat treated in the range of 400-675 °C for 1-2 h in hydrogen atmosphere, which resulted in reduction of iron cations to α-Fe and FeO. The reduction of iron cations in glass was not completely occurred. Saturation magnetization of these samples was 8-37 emu g -1 . For the formation of glass ceramic, As quenched glass flakes heat treated at 590 °C for 1 h. Heat treatment of glass ceramic containing magnetite at 675°C in hydrogen atmosphere for 1 h led to reduction of almost all of the iron cations to α-Fe. Saturation magnetization of this sample increased from 19.8 emu g -1 for glass ceramic to 67 emu g -1}, Keywords = {Magnetite, α-Fe, Reduction, Glass, Glass Ceramic, Magnetic Composite}, volume = {12}, Number = {3}, pages = {38-47}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.3.5}, url = {http://ijmse.iust.ac.ir/article-1-828-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-828-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Amini, A. R. and Zakeri, A. R. and Sarpoolaky, H.}, title = {EFFECT OF A FOURTH COMPONENT (Na2O, SrO, MgO AND BaO) ADDITION TO CaO-Al2O3-SiO2 SYNTHETIC SLAG ON SULFUR REMOVAL FROM PLAIN CARBON STEEL}, abstract ={In this paper, the effect of MgO, BaO, Na 2 O and SrO addition to a pre-melted CaO-Al2O3 -Si 2 O synthetic slag on sulfur removal from plain carbon steel was studied under the same experimental conditions. The slags were pre-melted at 1400°C in an electric resistant furnace and desulfurization experiments were carried out in a high frequency induction furnace. The results showed that the optimum reaction time for desulfurization was 15 min. It was found that while SrO addition to the ternary slag enhances the sulfur removal capability, MgO, Na 2O and BaO additions reduce desulfurization efficiency of the ternary slag. Moreover, it was observed that restricting access to oxygen from the atmosphere by using a covered crucible, could increase desulfurization efficiency of the slag by more than two fold}, Keywords = {Synthetic slag, Calcium aluminate, Desulfurization, Steelmaking.}, volume = {12}, Number = {3}, pages = {48-55}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.3.6}, url = {http://ijmse.iust.ac.ir/article-1-829-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-829-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Amuei, M. and Emamy, M. and Khorshidi, R. and Akrami, A.}, title = {MICROSTRUCTURAL STUDIES OF Ti-REFINED Al2014 ALLOY PREPARED BY SIMA PROCESS}, abstract ={In this study, Al2014 alloy refined with Al-5%Ti-1%B master alloy was prepared by strain-induced melt activated (SIMA) process. The main variables of the SIMA process were cold working, holding time and temperature in semi-solid state. Cold working was applied on specimens by upsetting technique to achieve 10%, 20% and 30% height reduction. Cold worked specimens were heat treated in semi-solid state at 585 °C, 595 °C, 605 °C, 615 °C, 625 °C and 635 °C and were kept in these temperatures for different times (20 and 30 min). Observations through optical and scanning electron microscopy were used to study the microstructural evaluation. The results revealed that fine and globular microstructures are obtained by applying 30 % height reduction percentage and heat treating in 625 °C for 30 min. Comparison between refined and unrefined Al2014 alloy after applying SIMA process showed that Al-5%Ti-1%B master alloy has no significant effect on average globule size but makes the final structure more globular.}, Keywords = {Aluminum alloy, Grain refinement, SIMA process, Microstructure}, volume = {12}, Number = {3}, pages = {56-65}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.3.7}, url = {http://ijmse.iust.ac.ir/article-1-830-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-830-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Hemmati, M. H. and VahdatiKhaki, J. and Zabett, A.}, title = {THE EFFECT OF VOLATILE MATTER OF NON-COKING COAL ON THE REDUCTION OF IRON OXIDE AT NON-ISOTHERMAL CONDITION}, abstract ={The volatile matter of non-coking coal was used for the reduction of hematite in argon atmosphere at nonisothermal condition. A thermal gravimeter furnace enable to use an 80 mm-height crucible was designed for the experiments to measure the weight changes of about 10 grams samples. A two-layered array of coal and alumina and four-layered array of iron oxide, alumina, coal and alumina was used for the devolatilization and reduction experiments, respectively. The net effect of volatile reduction of Fe 2O3was determined and it was observe that 45% reduction has been achieved. Three distinct regions were recognized on the reduction curve. The reduction of hematite to magnetite could be completely distinguished from the two other regions on the reduction curve. At 600-950°C, the reduction was accelerated. 63% of volatile matter resulted in 25% of total reduction before 600°C while the remaining volatile matter contributed to 75% of the total reduction. From the reduction rate diagram, the stepwise reduction of the iron oxides could be concluded. The partial overlap of the reduction steps were identified through the XRD studies. The starting temperature of magnetite and wüstite reduction were determined at about 585°C and at 810°C, respectively.}, Keywords = {volatile matter, iron oxide, non-coking coal,non isotherm, reduction}, volume = {12}, Number = {3}, pages = {66-74}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.3.8}, url = {http://ijmse.iust.ac.ir/article-1-831-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-831-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {KhoshomidAghdam, E. and Naghizadeh, R. and Rezaie, H. R.}, title = {SYNTHESIS OF MgAl2O4-Ti(C,N) NANOCOMPOSITE BY ALUMINOTHERMIC REDUCTION}, abstract ={MgAl2O4/Ti(C,N) composites were synthesized through aluminothermic reaction between Al,TiO 2,MgO powders and phenolic resin in coke bed condition. Effect of addition of carbon black and sugar into the mixture at different temperatures were investigated. The phases and microstructures of samples were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). MgAl 2O4 /Ti(C,N) composites without additive were obtained after heat treatment at 1600˚C. With addition of carbon black TiC, TiN and Ti(C,N) were appeared after firing at 1400˚C and formation of spinel/Ti(C,N) composites were completed at 1600˚C. In sample containing sugar, MgAl2O4 -Ti(C,N) composite were completely synthesized at 1400˚C. In this sample crystallite size of Ti(C,N) were 32 nm and carbon content of titanium carbonitride (Ti(C,N)) reached to 0.442 value.}, Keywords = {MgAl2O4-Ti(C,N) composite, Aluminothermic reaction, Coke bed, TiC, TiN, Spinel}, volume = {12}, Number = {3}, pages = {75-82}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.3.9}, url = {http://ijmse.iust.ac.ir/article-1-832-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-832-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Abbasian, A. and Kashefi, M. and Ahmadzade-Beiraki, E.}, title = {QUALITY CONTROL OF PRECIPITATION HARDENED ALUMINIUM ALLOY PARTS VIA EDDY-CURRENT NONDESTRUCTIVE EVALUATION}, abstract ={Precipitation hardening is the most common method in the strengthening of aluminium alloys. This method relies on the decrease of solid solubility with temperature reduction to produce fine precipitations which impede the movement of dislocations. The quality control of aluminium alloy specimens is an important concern of engineers. Among different methods, non-destructive techniques are the fastest, cheapest and able to be used for all of parts in a production line. To assess the ability of eddy current as a non-destructive method in the evaluation of precipitation hardening of aluminium alloys, 7075 aluminium alloy specimens were solution treated at 480°C for 1 hr. and followed by water quenching. Afterwards, the specimens were aged at different temperatures of 200, 170, 140, 110 and 80°C for 8 hr. Eddy current measurements was conducted on the aged specimens. Hardness measurement and tensile test were employed to investigate the mechanical properties. It was demonstrated that eddy current is effectively able to separate the specimens with different aging degree due to the change of electrical conductivity during aging process}, Keywords = {7075 aluminium alloy, precipitation hardening, Eddy current, Non-Destructive evaluation.}, volume = {12}, Number = {3}, pages = {83-87}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.3.10}, url = {http://ijmse.iust.ac.ir/article-1-833-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-833-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Mohsenifar, A. and Aboutalebi, M. R. and Aboutalebi, S. H.}, title = {EFFECT OF HIGH TEMPERATURE OXIDATION ON THE CORROSION BEHAVIOR OF ALUMINIZED LOW CARBON STEEL IN MOLTEN ALUMINUM}, abstract ={Hot dip aluminizing was carried out on the low carbon steel rod under optimized conditions. The aluminized samples were further oxidized at 1000̊C in air atmosphere at two different times of 20 and 60 minutes. Microstructure study and phase analysis were studied by scanning electron microscopy and X-ray diffraction methods, respectively. The characterization of the coating showed that, Fe2 Al5 has been the major phase formed on the surface of specimen before heat treatment. Following the oxidation of the coating at high temperature, Al 2O3 was formed on the surface of coating while Fe 2 Al5 transformed into FeAl and Fe 3 Al which are favorable to the hot corrosion resistance of the coating. Corrosion resistance of aluminized samples before and after heat treatment was evaluated by rotating the samples in the molten aluminum at 700 ̊C for various times and the dissolution rate was determined. The obtained results showed that by oxidizing the coating at high temperature, the corrosion resistance of the samples in molten aluminum improves significantly.}, Keywords = {low carbon steel, hot dip aluminizing, high temperature oxidation, corrosion}, volume = {12}, Number = {3}, pages = {88-94}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.3.11}, url = {http://ijmse.iust.ac.ir/article-1-834-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-834-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Zahedi, A. M. and Rezaie, H. R. and Javadpour, J.}, title = {THE EFFECT OFCARBON NANOTUBES ON THE SINTERING BEHAVIOR OF ZIRCONIA BASED MATERIALS}, abstract ={Different volume fractions (1.3, 2.6, and 7.6 Vol.%) of carbon nanotubes (CNTs) were dispersed within 8Y-TZP nanopowders. Mixed powder specimens were subsequently processed by spark plasma sintering (SPS) and effects of CNTs on the sintering process of 8Y-TZP/CNT composites was studied. Maintenance of CNTs through the SPS process was confirmed using TEM and Raman Spectroscopy. Studies on the sintering profile of zirconia-CNT composites (Z-xC composites) could, to some extent, clarify the effect of CNTs’ volume fraction on the densification rates of Z-xC composites. The specimen with the highest content of CNT (Z-7.6C) showed the lowest sintering rate while it was unable to reach full density.}, Keywords = {Sintering, Composites, Mechanical properties, ZrO2}, volume = {12}, Number = {4}, pages = {1-8}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.4.1}, url = {http://ijmse.iust.ac.ir/article-1-808-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-808-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {KhosraviSaghezchi, M. and Ajami, R. and BiazarMarkie, M. and Sarpoolaky, H.}, title = {MICROSTRUCTURE CHARACTERISTIC OF ALUMINUM TITANATE SYNTHESIED BY BOTH SOLID- STATE AND SOL-GEL PROCESSES}, abstract ={A comparing study on formation and microstructure features of aluminum titanate is investigated through both solid-state and sol-gel processes. Aluminum titanate formed by firing at 1350ºC and 1450ºC for 4h in solid-state process. In the sol-gel process formation of submicron sized particles is followed by addition of sucrose into the transparent sol. XRD analysis was confirmed the formation of aluminum titanate at 1400ºC  in lower duration of calcination (3h) without any additives in the sol-gel process. In this work 2wt% MgO is added to the samples as the additive for forming acceleration of aluminum titanate. The influence of MgO addition and heat treatment are studied on phase formation and microstructure development of aluminum titanate in both procedures. Additive optimizes aluminum titanate formation at lower temperatures (1300-1350ºC). Phase and microstructure studies of Mg containing samples optimally show significance in aluminum titanate formation.}, Keywords = {Aluminum titanate, Solid-state, Sol-gel, MgO, Sucrose}, volume = {12}, Number = {4}, pages = {9-18}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.4.9}, url = {http://ijmse.iust.ac.ir/article-1-757-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-757-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Maleki, M. and Rozati, M.}, title = {Si/ZnO NANO STRUCTURED HETEROJUNCTIONS BY APCVD METHOD}, abstract ={In this paper, polycrystalline pure zinc oxide nano structured thin films were deposited on two kinds of single crystal and polycrystalline of p and n type Si in three different substrate temperatures of 300, 400 and 500◦C by low cost APCVD method. Structural, electrical and optical properties of these thin films were characterized by X ray diffraction, two point probe method and UV visible spectrophotometer respectively. IV measurements of these heterojunctions showed that turn on voltage and series resistance will increase with increasing substrate temperature in polycrystalline Si, while in single crystal Si, turn on voltage will decrease. Although they are acceptable diodes, their efficiency as a heterojunction solar cell are so low}, Keywords = {Heterojunction, Thin film silicon solar cell, Air pressure CVD, p-type Si, Diodes, ZnO}, volume = {12}, Number = {4}, pages = {19-27}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.4.19}, url = {http://ijmse.iust.ac.ir/article-1-671-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-671-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {ErshadiKhameneh, M. and Shahverdi, H. and Hadavi, M. M.}, title = {CREEP AGE FORMING OF Al-Zn-Mg ALLOYS WITH OPTIMIZATION OF MECHANICALl PROPERTIES}, abstract ={Creep age forming (CAF) is one of the novel methods in aerospace industry that has been used to manufacture components of panels with improved mechanical properties and reduced fabrication cost. CAF is a combined age-hardening and stress-relaxation that are responsible for strengthening and forming, respectively. This paper deals with the experimental investigations of mechanical and springback properties of Al-Zn-Mg Al alloy in creep forming process. Creep forming experiments have been performed at temperatures of 120◦C and 180◦C for 6–72 h. Results indicated that yield stress and hardness of creep age formed specimens increased with increasing forming time and temperature,  simultaneously induced deflection by stress-relaxation increased. Incorporating spring back and mechanical properties, it can be found that the appropriate forming cycle was 180 ◦C/24 h among all forming conditions. CAF Time increase to a certain extent increased mechanical properties. This can be attributed to presence of stress in CAF that causes the precipitates be finer because of creation more nucleation sites. Therefor the growth of precipitates, takes place at long time and postpones the decreasing of the yield stress}, Keywords = {creep age forming, Al-Zn-Mg alloy, age hardening, stress relaxation, mechanical properties}, volume = {12}, Number = {4}, pages = {28-33}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.4.28}, url = {http://ijmse.iust.ac.ir/article-1-737-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-737-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {QaedAminiHaroooni, A. and Eskandari, H. and Maddahy, M. H. and Danaee, I.}, title = {CORROSION BEHAVIOR OF 6063 ALUMINUM ALLOY IN ETHYLENE GLYCOL-WATER SOLUTION}, abstract ={The electrochemical behavior of 6063 aluminum alloy in ethylene glycol-water mixture was investigated by polarization curves and AC impedance measurements (EIS).  The results obtained from polarization curves showed that corrosion rate decreased with increasing ethylene glycol concentration. EIS data showed the decrease in the interface capacitance which caused by adsorption of ethylene glycol at the surface of aluminum alloy. The cathodic current increased with the increase in rotating speeds of solution and the anodic current decreased. The effect of temperature was studied and the corrosion rate was increased with increasing the temperature. In addition, thermodynamic parameters were calculated in different ethylene glycol concentrations}, Keywords = {Corrosion, Aluminum 6063, Ethylene glycol, Hydrodynamic, Temperature}, volume = {12}, Number = {4}, pages = {34-44}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.4.34}, url = {http://ijmse.iust.ac.ir/article-1-668-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-668-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Maddah, M. and Rajabi, M. and Rabiee, S. M.}, title = {EFFECT OF SiC ADDITION ON HYDROGEN DESORPTION PROPERTIES OF NANOCRYSTALLINE MgH2 SYNTESIZED BY MECHANICAL ALLOYING}, abstract ={In this study, the composite material with composition of MgH2-5 wt% SiC has been prepared by co-milling of MgH2 with SiC powder. The effect of milling time and additive on MgH2 structure, i.e. crystallite size, lattice strain, particle size and specific surface area, and also hydrogen desorption properties of obtained composite was evaluated by thermal analyzer method and compared with pure un-milled MgH2. The phase constituents and grain size of powder were characterized by X-ray diffractometry method. It has been shown that addition of 5 wt% SiC to MgH2 and mechanical alloying up to 30 h formed a nanocrystalline composite with the average crystallite size of 12 nm, average particle size of 0.5 µm and specific surface area of 10 m2/g. On the other hand, SiC can help to break up particles and reduce the particle size. As a consequence, the desorption temperature of composite material milled for 30 h has decreased from 435 °C to 361 °C.}, Keywords = {Magnesium hydride, Mechanical alloying, Hydrogen desorption temperature, SiC addition}, volume = {12}, Number = {4}, pages = {45-50}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.4.45}, url = {http://ijmse.iust.ac.ir/article-1-787-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-787-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Barati, E. and Farmanesh, Kh.}, title = {EVALUATION OF FORGING PARAMETERS ON AL-7075 AIRCRAFT DOOR BRACKET BY SIMULATION}, abstract ={The purpose of this research is to achieve the optimal parameters for producing forged aluminium alloy 7075 aircraft door bracket by using finite element modelling (FEM) with commercial DEFORM-3D V6.1 and physical simulations with plasticine and Plexiglas dies. Also, forging speed has been examined as the main factor for controlling to produce a part without any defects. The results of Physical Simulation showed that the flow pattern has good agreement with the results of FEM that based on the use of hydraulic presses with initial billet and dies temperatures 410 and 400 ° C, respectively, and different forging speeds 5, 10 and 15 mm/sec. Distribution of effective strain rate, effective strain, effective stress, temperature , forging force and dies­ wear showed improvement the results in forging speed of 5 mm/sec. Processing map of Aluminium alloy 7075 also checked out at constant strain 0.5, indicated that the specified area of the forged part is located in a safe area. Forging force in optimized forging speed 5 mm/sec showed that the forging process using a 1000-ton press can be done easily}, Keywords = {FEM, 7075 Alloy, Physical Simulation, forging speed}, volume = {12}, Number = {4}, pages = {51-61}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.4.51}, url = {http://ijmse.iust.ac.ir/article-1-753-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-753-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Dehnavi, M. and Haddad-Sabzevar, M. and Avazkonandeh-Gharavol, M.H. and Vafaeenezhad, H.}, title = {EFFECT OF COOLING RATE AND GRAIN REFINEMENT ON THE MICROSEGREGATION IN Al-4.8 wt.% Cu ALLOY}, abstract ={ Microsegregation is one of the most important phenomena occurs during solidification. It usually results in formation of some unexpected second phases which generally affect the mechanical properties and specially reduce the workability of casting products. The aim of this research is to study the effect of cooling rate and grain refinement on the microsegregation in Al-4.8 wt.% Cu. For this purpose two series of experiments were designed. In the first set of experiments, the alloy was melted and cooled in three different rates, i.e. 0.04, 0.42, and 1.08 K/s in a DTA furnace. In the second series of experiments, the effect of grain refinement on the microsegregation at a constant cooling rate of 0.19 K/s was investigated. Al-5Ti-1B master alloy was used as grain refiner. Results showed that by increasing the cooling rate the amount of non-equilibrium eutectic phase increases from 5.1 to 7.4 wt.%, and the minimum concentration of solute element in primary phase decreases from 1.51 to 1.05 wt.% Cu. By grain refinement of the alloy, the amount of non-equilibrium eutectic phase decreases from 5.5 to 4.7 wt.%, and the minimum concentration of solute element in the primary phase increases from 0.98 to 1.07 wt.% Cu. So it is concluded that increasing cooling rate in the range of 0.04 to 1.08 K/s, increases and grain refinement reduces the microsegregation }, Keywords = {Cooling rate, Microsegregation, α+Al2Cu eutectic, Al-Ti-B master alloy.}, volume = {12}, Number = {4}, pages = {62-70}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.4.62}, url = {http://ijmse.iust.ac.ir/article-1-744-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-744-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Gholami, J and Pourbashiri, M and Sedighi, M}, title = {EFFECT OF CHANNEL ANGLE AND FRICTION IN MODIFIED ECAP-CONFORM PROCESS OF Al-6061: A NUMERICAL STUDY}, abstract ={Equal-channel angular pressing (ECAP) combined with the Conform process provides a solution for the continuous production of ultrafine-grained materials. In the present study finite element method was executed to investigate the effects of die channel angle and friction on the strain homogeneity and the required torque in ECAP-Conform process. Deformation behaviour of Al 6061 wires was analyzed by using the ABAQUS/Explicit software. Finite element analyses by considering different channel angles (90ᵒ, 100ᵒ and 110ᵒ) and various friction conditions of 0.2, 0.3 and 0.4 were surveyed. The results revealed two distinct trends in which by increasing the channel angle among 90ᵒ to 110ᵒ, the amount of induced plastic strain through the wire reduced about 40%. Also required processing torque was decreased about50%. In addition more homogeneity was observed in higher angle values. The results regarding to equivalent strain, obtained from FE analyses, showed a good agreement with previous studies. Eventually plastic strains and required torque were increased about 8% and 12% when friction coefficient raised between (0.2-0.4).}, Keywords = {SPD, ECAP-Conform, Numerical Study, Al 6061}, volume = {12}, Number = {4}, pages = {71-76}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.4.71}, url = {http://ijmse.iust.ac.ir/article-1-745-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-745-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Alipour, M. and Emami, M. and EslamiFarsania, R. and Siadati, M. H. and Khorsand, H.}, title = {EFFECTS OF A MODIFIED SIMA PROCESS ON THE STRUCTURE, HARDNESS AND MECHANICAL PROPERTIES OF Al-12Zn-3Mg-2.5Cu ALLOY}, abstract ={A modified strain-induced melt activation (SIMA) process was applied and its effect on the structural characteristics and hardness of the aluminum alloy Al–12Zn–3Mg–2.5Cu was investigated. Specimens subjected to a deformation of 40% at 300 °C were heat treated at various times (10-40 min) and temperatures (550-600 °C). Microstructural studies were carried out using optical and scanning electron microscopies (SEM). Results showed that the best microstructure was obtained at the temperature and time of 575 °C and 20 min, respectively. The hardness test results revealed superior hardness in comparison with the samples prepared without the application of the modified SIMA process. T6 heat treatment including quenching to 25 °C and aging at 120 °C for 24 h was employed to reach to the maximum strength. After the T6 heat treatment, the average tensile strength increased from 231 MPa to 487 and 215 MPa to 462 for samples before and after strain-induced melt activation process, respectively. Ultimate strength of globular microstructure specimens after SIMA process has a lower value than as-cast specimens without SIMA process}, Keywords = {Casting, Heat treatments, Microstructure, SIMA process}, volume = {12}, Number = {4}, pages = {77-88}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.4.77}, url = {http://ijmse.iust.ac.ir/article-1-590-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-590-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} } @article{ author = {Shaker, E. and Sakaki, M. and Jalaly, M. and Bafghi, M.}, title = {MICROWAVE SYNTHESIS OF B4C–Al2O3 COMPOSITE IN A MECHANICALLY ACTIVATED Al/B2O3/C POWDER MIXTURE}, abstract ={B4C–Al2O3 composite powder was produced by aluminothermic reduction in Al/B2O3/C system. In this research, microwave heating technique was used to synthesize desired composite. The ball milling of powder mixtures was performed in order to study the effect of mechanical activation on the synthesis process. The synthesis mechanism in this system was investigated by examining the corresponding binary sub-reactions. The self-sustaining reduction of boron oxide by Al was recognized to be the triggering step in overall reaction.}, Keywords = {Boron carbide, Microwave synthesis, Mechanical milling,}, volume = {12}, Number = {4}, pages = {89-99}, publisher = { Iran University of Science & Technology}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.22068/ijmse.12.4.89}, url = {http://ijmse.iust.ac.ir/article-1-733-en.html}, eprint = {http://ijmse.iust.ac.ir/article-1-733-en.pdf}, journal = {Iranian Journal of Materials Science and Engineering}, issn = {1735-0808}, eissn = {2383-3882}, year = {2015} }