Abstract
The objective of this research is to investigate the effect of parameters on the microstructure and mechanical properties of friction stir welded butt joints of dissimilar aluminum alloy sheets between Semi-Solid Metal (SSM) 356 and 6061. The base metal of SSM 356 and 6061 was located on the advancing side and on the retreating side, respectively. The cylindrical pin was used as the welding tool geometry. Friction stir welded using different tool rotation speed (710, 1,000 and 1,400 rpm) and welding speed (80,112 and 160 mm/min). From investigated, the maximum average tensile strength of 175.40 MPa was achieved for the joint produced at tool rotation speed 1,400 rpm, welding speed 112 mm/min. Metallurgy and welding structures occurred of aluminum composite material will consist of two types of definition than the base metal.
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