Abstract
In this work, the interface wave was first shown in resistance butt spot welding of titanium (Ti) alloy and stainless steel (SS) as in explosive welding and magnetic pulse welding. Interface wave exhibited a fracture mode in the joint, so which were called fracture interface waves. The wavelength and the peak of the fracture interface wave weaken from the center of the joint to the outer edge. The formation of the wave is closely related to the interface microstructure. Fracture interface wave would have a direct impact on the joint properties. Analysis of the formation of fracture interface wave is helpful to improve the quality of the joint. Thermo-electric-mechanical-magnetic-flow coupling in resistance butt spot welding makes it difficult to explain the forming mechanism completely by existing theory and experiment methods. The key conditions of fracture interface wave propagation were analyzed by means of thermo-electric-mechanical numerical simulation. The formation process was explained in addition to the microstructure, mechanical properties.
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