Preliminary Investigation of Friction Stir Welding Aluminium/Copper Lap Joints

摘要: An investigation has been made of the feasibility friction stir welding dissimilar lap joint an aluminium plate to a copper plate, which is difficult weld by fusion methods because formation brittle intermetallic compounds (IMC). Although level bond strength was quite low, it exhibited general tendency increase with rise in rotation speed. Various microstructures different morphologies and properties were observed stirred zone Al/Cu interfacial region. Comparison fracture location microstructure suggests that IMC formed region responsible for low joints. X-ray diffraction from surfaces indicate Al4Cu9, AlCu, Al2Cu main The performance joints improved significantly using Zn intermediate layer between Al Cu owing limiting harmful distributing them over wider areas.