Interfacial microstructure and strength of magnetic pulse welded A5052 aluminum alloy/SPCC steel lap joint

A5052 aluminum alloy and SPCC steel plates were welded using magnetic pulse welding, interfacial microstructure strength of the lap joint examined. The used for a flyer plate parent plate, respectively. Charging energy stored in capacitor gap between changed. Microstructure was examined by an optical microscope, scanning electron microscope transmission microscope. Tensile-shear test evaluating joint. welding achieved at charging above 6.0 kJ 1.0 mm. range which strong is accomplished different each increased with decreasing gap. not fractured interface tensile-shear whereas fracture occurred part base metal. exhibited characteristic wavy morphology. An intermediate layer produced along interface. Scanning observation revealed that composed fine Al-Mg grains dispersed dendritic Al-Fe intermetallic compound particles.