Multi Response Optimization of Friction Stir Spot Welding Process

Friction stir spot welding (FSSW) is a solid state method mainly used to join non-ferrous metals and their alloys. When opposed other processes, FSSW has the benefits of being pollution-free having no filler material. In this study an attempt was made for multi response optimization friction welded EN AW 5005 aluminum alloy using Taguchi Grey relational analysis (GRA). Pin height (h, mm), tool rotation (S, rpm), time (t, s) were as input parameters while tensile shear strength (TSS, MPa) joint efficiency (JE, %) parameters. Therefore, Taguchi’s L8 orthogonal design matrix in order plan experiments. GRA then applied determine optimum condition which gives higher grey degree. Analysis Variance (ANOVA) also carried out show most significant parameter. Finally, confirmation test confirm results improvement grade throughout method. The best obtained with such as
 2.6 mm pin height, 1500 rpm 10 s 122.16 MPa TSS 111.05 JE. A 0.310 optimal parameter relation grade.