Multi Response Optimization of Parameters in F SW for Tailor Welded Blanks A A 5052 H32 and A A 5083 O u sing Response Surface Methodology

Abstract

Tensile properties, microhardness, and formability of the tailor welded blank of AA5052-H32 and AA5083-O were investigated. To detect the influence of FSW parameters such as shoulder diameter (SD), rotational speed (RS), and travel speed (TS), a central composite design (CCD) was derived. The response surface methodology (RSM) technique is used to develop the mathematical model and optimization of multiple responses, i.e., ultimate tensile strength (UTS), Yield strength (YS), percentage elongation (TE), dome height (DH), and microhardness (μH). Analysis of variance (ANOVA) technique is used to validate the competency of the established model, and the regression equation is derived to predict the value of output responses. It is found that the welding parameter of FSW plays a significant role in fabricating the joint. It is observed that for the welded combination of AA5052-H32 and AA5083-O, the metallurgically defect-free and sound weld produced. The results are very much significant to a better understanding of the effect of the combination of SD, TS, RS to fabricate the FSW joint. The experimental and predicted result shows a good relationship with each other.