The effect of welding current on the tensile load capacity of dissimilar metal carbon steel - Stainless steel TIG-spot welded joint

Resistance spot welding (RSW) is widely regarded as the predominant technique employed in the automotive sector for the purpose of joining thin sheets. Nevertheless, a significant number of intricate applications do not provide access from both sides of the sheet metal, a prerequisite for this procedure. The gap is addressed by an examination of a one-sided Tungsten Inert Gas (TIG) spot welding method employed to joint dissimilar metals, specifically carbon steel and stainless steel. The objective of this study is to examine the influence of welding current on the tensile load capacity of TIG-spot joint composed of dissimillar metals. The materials utilized in this study are low carbon steel and stainless-steel plates, both having dimensions of 10 cm in length, 3 cm in width, and a thickness of 0.8 mm. (standard AWS D8.9). Welding current was set up of 70, 80, 90, and 100 amperes with a constant welding time of 4 seconds. The result shows that a welding current of 100 A provides the weld zone with increased heat, allowing for better material penetration and fusion, thus increasing the tensile load capacity.