Microstructural Characterization And Mechanical Properties In Friction Stir Welding Of Aluminum And Titanium Dissimilar Alloys

摘要

Al-Si alloy and pure titanium were lap joined using friction stir welding technology. Microstructure and tensile properties of joints were examined. The maximum failure load of joints reached 62% of Al-Si alloy base metal with the joints fractured at the interface. X-ray diffraction results showed that new phase of TiAl_3 formed at the interface. The microstructure evolution and the joining mechanism of aluminum-titanium joints were systematically discussed.