Abstract
Abstract Friction Stir Welding is a variation of friction welding method. Accomplishing the optimal processing parameters for the best probable design is still a challenging task. This paper presents a novel methodology for the optimization of welding parameters on dissimilar friction stir welded joints between AA6061-T651 and AA7075-T651 aluminum alloys with multiple responses. In this study, welding parameters namely rotational speed, welding speed and pin profiles are optimized with the considerations of multi responses such as Ultimate Tensile Strength (UTS) and Hardness (H). L9 Orthogonal array was taken to conduct the experiments with the range 800-1000 revolutions per minute (rpm) for rotational speed and with welding speed from 90-110 millimeter/minute (mm/min). These methods show a good convergence with the trial and the optimum process parameters combinations, where the maximum Ultimate Tensile Strength and the Hardness are obtained.
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