Optimization of Process Parameters of Friction Stir Welding of Aa 6082-T6 Using Grey Based Taguchi Method

Friction stir welding process is a mushy state joining technique and is extensively used for unification of similar and dissimilar metals employed for aerospace, automobile and other fabrication industries. Friction stir welding gives improved mechanical and metallurgical characteristics in the nugget zone in contrast with the conventional welding processes. In this study, three main factors, each at two levels are employed during experiment; The responses measured in the study include hardness, Impact toughness and percentage elongation and are converted into grey values. The optimal permutation of parameters has been found by the Taguchi Grey relational analysis.