The Laser Weldability of Anodized 6061 Aluminum Alloy

Elmi Hosseini, Seyed Reza; Azarnia, Fatemeh; Saghafiana, Hassan; Behzadifara, Javad

doi:10.22068/ijmse.4581

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‎ 10.22068/ijmse.4581

The Laser Weldability of Anodized 6061 Aluminum Alloy

Seyed Reza Elmi Hosseini

, Fatemeh Azarnia

, Hassan Saghafiana

, Javad Behzadifara

Abstract: (105 Views)

In this study, the feasibility of laser welding on anodized aluminum alloy has been investigated. There are many demands in the industry for the welding of anodized aluminium sheets. Firstly, the anodizing process was performed by changing the anodizing time and keeping the other anodizing parameters constant. The anodizing process was performed at three different anodizing times of 30, 45, and 60 minutes. Then, the sample with the largest oxide layer thickness, which was obtained at the higher anodizing time, was chosen for the laser welding. The welding process was performed at a laser power of 1500 watts and a welding speed of 300 mm/s on an anodized 6061-T6 aluminum alloy with an oxide layer thickness of 17 microns. The current investigation depicted that the sound joint occurred between two anodized aluminium sheets. Although the anodized layer acts as an inhibitor for the joining of aluminum sheets due to its high melting point, the results showed a homogeneous distribution of the elements within the weld zone. In the meantime, the growth of dendrites across the weldment shows the concentration of elements in the interdendritic regions of the weldment.

Keywords: Aluminum alloy, Anodizing, Laser welding, Anodized layer, Dendrites.