A6061/SPC270の重ね合わせFSWにおける接合プローブ押し込み量の影響

抄録

A6061 and SPC270 plates with a thickness of 1mm were successfully welded by lap friction stir welding at tool probe. The effect of the tool probe plunge depth on the mechanical strength and the microstructure of the weld was investigated by tensile shear strength test and microstructure observation. The maximum tensile shear strength of 1749 N was obtained at tool probe plunge depth of 0.05 mm. The cross-section microstructure of the weld showed smooth weld interface without hook structure at outer periphery of the probe trace and intermetallic compound layer at the retreating side of the weld.