Abstract
The activated tungsten inert gas (TIG) welding mainly focuses on increasing depth of penetration, reducing width of weld, increase speed of welding and improve weld quality. The objective of this experimental work is to find optimal set of process parameters that achieve higher tensile strength, hardness and depth of penetration. The process parameters selected for experimental work were welding current, gas flow rate and root gap. The design of experiment was carried out using central composite design of response surface methodology. Silicon dioxide activated flux powder was used along with acetone for activated TIG welding process. For experimentation, austenitic stainless steel grade of 304L was used as parent material also the filler material was having same composition. The ANOVA was carried out determine significance of different process parameters on response factors. Further comparative analysis was presented with help of graphs. The TOPSIS optimisation approach was used to optimise the factors.
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