Abstract
Authors tried to butt-joint weld commercially pure titanium plate to aluminum alloy plate by solid state welding using a rotating probe, and investigated the effects of welding conditions and intermetallic compound formed at the weld interface on the properties of the joint. The following results were obtained.The titanium plate and the aluminum alloy plate were successfully butt-joint welded using a rotating probe. The tensile strength of the joint made under the optimum conditions was so high that the joint efficiency was about 97%.The joint strength varied with the probe rotation speed and the offset. Fracture of the joint made under the optimum conditions occurred at the position in aluminum alloy, where the hardness was lower, 5–7mm away from the weld interface as well as at the interface between aluminum matrix and titanium fragments which were scattered around the weld interface.By heating at 550°C for 2h, intermetallic compound obviously appeared at the weld interface of the joint made under the optimum conditions. Fracture of the heated joint occurred at the weld interface, and the tensile strength and the elongation extremely decreased.
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