Abstract
In this study, friction stir welding of similar and dissimilar materials was carried out using die casting aluminum alloy ADC12 and wrought aluminum alloy 5052 and 6061 to evaluate the tensile strength and to analyze the fracture of jointed materials. In ADC12 similar joint, the tensile strength was lower than that of base material. Joining efficiency was 86% and adequate tensile strength was obtained. Softening due to heat generated during friction stirring was not observed. The fracture location was the Stir Zone. The tensile strength of similar joint is lower than that of the base material due to the different shape and distribution of the Si phase in the Stir Zone. In dissimilar joints of ADC12with 5052 and 6061, joining efficiency was more than 80%. Placing a material with lower tensile strength at the Advanced Side will result in higher tensile strength than placing it in the Retreating Side. The fracture location of dissimilar joints was the softened point of the wrought aluminum alloy (5052, 6061), where the tensile strength of base material is lower than ADC12.
