Experimental investigation and numerical modeling of deep penetration laser and gta welding processes

Abstract

Fusion welding process is complex in nature since it involves several interactive physical phenomena An accurate knowledge of weld induced distortions and residual stress final micro structure and mechanical processes of weld joint are greatly influenced by thermal history cooling rate and consequently the weld dimensions Real time measurement of the transient growth of temperature and material flow field during welding is extremely difficult and there is uncertainty to accurately measure the