Single-Shot Explosive Welding of Hard-to-Weld A5083/SUS304 Clad Using SUS304 Intermediate Plate

Abstract

A5083/SUS304 is known as a very difficult combination to weld by an explosive welding technique. This combination is tried to be explosively welded using thin SUS304 intermediate plate. The formation of thick interfacial zone at welded interface disturbs the bonding between the interface and the microstructure of this interfacial zone is composed of Al and Fe₄Al₁₃. Separation is generated at SUS304/interfacial zone or inside the interfacial zone. The position of the separation fabricated by explosive welding is different with it fabricated by the other method which uses heat treatment. Since the thick interfacial zone is formed by excess energy at the interface, to insert thin SUS304 plate is effective as to decrease the energy dissipated by the collision between plates. Moderate collision velocity is also required for good bonding to generate the metal jet. Welding window is constructed by the parameters of kinetic energy loss by collision (ΔKE) and collision velocity (V_p), and the weldable range of this combination is V_p =350-670m/s and ΔKE=1×10⁵-5.5×10⁵J/m².