The hot cracking susceptibility subjected the laser beam oscillation welding on 6XXX aluminum alloy with a partial penetration joint

A laser beam oscillation method using Galvano mirrors, which allows wide weld beads and controls thermal stress distribution, was suggested to suppress the formation of solidification cracks in welds. In order understand cracking behavior relation bead shape, welding performed under various widths frequency conditions. To evaluate effect parameter on susceptibility, a regression analysis based shape performed. Stress distribution generated during process also analyzed finite element modeling simulation. From results, it demonstrated that high shrinkage field at bottom partial penetrated suppresses cracking.