Al合金/Cu摩擦攪拌スポット接合材の引張特性に及ぼす接合条件の影響

抄録

A5052 aluminum alloy sheets and C1100 copper sheets were welded by friction stir spot welding with various tool plunge depth. A tensile shear test and a cross tension test were performed to investigate the effect of the tool plunge depth on the tensile properties of the joint. When the welding was performed using the tool plunge depth more than 1.9 mm, hooks were formed at edge of the welded area. As a result of the tensile shear test, the fracture load tended to increase as the tool plunge depth increased. When the tool plunge depth was less than 1.8 mm, the fracture occurred at the aluminum base metal, and when the tool plunge depth was more than 1.9 mm, the fracture occurred with the hook. As a result of the cross tension test, when the tool plunge depth was less than 1.8 mm, the fracture occurred at the welding interface, and when the tool plunge depth was more than 1.9 mm, the fracture occurred at the hook. The fracture load tended to increase more than 1.9 mm of the tool plunge depth.