Optimization of Tungsten Inert Gas Welding Process on the Tensile Properties of Dissimilar Metal Using Taguchi Method

Tungsten inert gas (TIG) welding also known as Gas Tungsten arc welding (GTAW) is a popular choice of welding process when high level of weld quality is required. In present investigation, TIG welding is observed using Taguchi L9 orthogonal method on the dissimilar Stainless Steel 304 and aluminum 2000. The two metals where butt joined using two filler metals joined simultaneously. The selected input parameters were Current, Voltage and Gas flow rate. Three levels of factors were chosen according to the previous works done on those materials. Further the mechanical testing was performed and ultimate tensile stress was studied as response. The different specimen have the same behavior describe as elastic material. The best stress at break of the joint was 9.525MPa which was very low compare to the ones of the aluminum and stainless steel works. That experimental stress was slightly higher than Predicted stress 8.89 MPa confirming the validity of the optimal setting.