Numerical simulation of transport phenomena and its effect on the weld profile and solute distribution during laser welding of dissimilar aluminium alloys with and without beam oscillation

Abstract Remote Laser Welding (RLW) of Aluminium alloys has significant importance in lightweight manufacturing to decrease the weight body white. It is critical understand physical process transport phenomena during welding which highly related mechanical performance joints. To investigate underlying physics and influence beam oscillation on heat transfer, fluid flow material mixing a transient three-dimensional Finite Element (FE) based Multiphysics model been developed validated from experiments. The effect speed, amplitude frequency fusion zone dimensions, profile, vorticity cooling rate thermal gradient butt Al-5754 Al-6005, with sinusoidal oscillation, analysed. was found that one additional vortex formed due churning action oscillating beam. With increase amplitude, welds become wider depth penetration decreases. An leads an molten metal suggesting introduces mixing. highlighted depends both diffusion convection.