A Study on Welding Characteristics, Mechanical Properties, and Penetration Depth of T-Joint Thin-Walled Parts for Different TIG Welding Currents: FE Simulation and Experimental Analysis

Considering the effect of heat input tungsten inert gas (TIG) arc welding for T-joint thin-walled parts aluminum alloy 6061-T6, here, characteristics are analyzed via finite element method. The experiments carried out using scanning electron microscope (SEM), optical (OM), and tensile test specimens to investigate microstructure variation weld zone (WZ), heat-affected (HAZ), base metal (BM), mechanical properties T-welded joint. joint explored assessed combined with in terms yield strength, Vickers hardness. Furthermore, effects different currents on penetration under deformation thoroughly investigated, appearance porosity incomplete fusion defects joints clearly illustrated. results show that strength joints, respectively, account less than 37% 74% (BM) strength. Moreover, depth deeply affected by current. maximum is achieved at about 2.18 mm current, partial emerged, affecting reducing welded It expected these will provide an analysis foundation optimization process, suppression defects, promotion future.