Mitigation of the Porosity Formation in the Laser Welding Process of an Aluminium Alloy (Al 1050) through Laser Wobbling

Laser welding of two overlapping workpieces poses challenges attributed to the inherent small gap at the weld joint, particularly when one workpiece is 2 mm thick. The occurrence of porosities near the gap and the inability to achieve the required keyhole depth result from inadequate heat transfer between the workpieces, compromising weld joint integrity. A viable solution involves employing the laser wobbling technique to create a molten pool bath, achieving the necessary molten pool depth. To mitigate the formation of porosities requires the optimization of laser parameters, including wobbling frequency, wobbling amplitude, laser power, and laser speed.