Parameters optimization of tungsten inert gas welding process on 304L stainless steel using grey based Taguchi method

Abstract Tungsten inert gas can be used to weld stainless steel due its offering sound weld, narrow fusion zone, precise control weld’s shape and over penetration, spatter free, slagless, stable arc low electrode wear. The goal of this study was offer the best process parameters for improving mechanical characteristics joint. experimental analysis approach applied in work, experiment carried out on 304L using L16. selected welding were travel speed, current welding, flow rate, length, root gap. Rockwell hardness, tensile strength, bending strength tests examined properties Based grey based Taguchi method, optimal level-settings rate gas, gap obtained 2.7 mm s −1 , 160 A, 14 l min 3 mm, 1 respectively. result ANOVA showed that has greatest impact it followed by speed joint quality with percentage contribution 80.77%, 10.86%, 5.98%, According confirmation results, average relational grade 0.863 which found between confidence interval 0.800 1.082 95% level, maximum 101.38 HRB, 1425.8 MPa 1648.6 MPa,