ANALYSIS AND OPTIMIZATION OF MECHANICAL PROPERTIES OF MARTENSITIC STAINLESS STEEL (SS410) WELDED JOINTS USING RESISTANCE SPOT WEDLING

Abstract

The Primary goal of this study is to examine the mechanical properties & optimize the parameters for resistance spot welding (RSW) of martensitic stainless steel (SS410) welded joints by conducting few mechanical tests like tensile test, Hardness test& Nugget Diameter determination. The Taguchi Method was utilized for the designin of experiments. The trials were performed by using L9 Orthogonal Array with 3 different parameters & levels; proces parameters are “Electrode force, welding current & welding time”. The mode of failure will also be investigated by the analysis of the fractured samples. After all these tests & examinations, by using MINITAB 19 program; the combination of the optimum welding parameters have been decided by the Analysis of Single-to-Noise (S/N) ratio; Analysis of Variance (ANOVA) is used to indicate the contribution & significance of parameters affecting the output; Regression Analysis was conducted to obtain the regression model & contour plots were also obtained from the analysis w/c are used to show the relationship b/w the parameters & the output.