Multi Response Optimization of Friction Stir Welding Process Parameters on Dissimilar Magnesium Alloys AZ 31 and ZM 21 using Taguchi-Based Grey Relation Analysis

摘要

This article presents the optimization of process parameters in Friction Stir Welding of Dissimilar Magnesium Alloys AZ 31 and ZM 21 with multiple responses based on Taguchi orthogonal array with grey relational analysis. The responses considered are tensile strength of the joint and weight loss in the salt fog corrosion test. The process parameters considered for optimization are the Rotational speed of the tool, Tool pin profile and axial load. The aim of this study is to find the best process parameters to maximize tensile strength while minimizing the aspect weight loss in the salt fog corrosion test. Based on the grey relational grade and ANOVA, optimum parameters have been identified and validated by the confirmation run. It has been concluded that tool pin profile and rotational speed are the dominant parameters while the axial load considered did not have significant effect on the responses.