Study on Microstructure and Properties of Al_0.1CoCrFeNi High Entropy Alloy/Aluminum Explosive Welded Joint

The Al_0.1CoCrFeNi high-entropy alloy and 1060 Al plate were welded by explosive welding using aluminum honeycomb structure explosive sensitized by hollow glass microspheres. In order to test the welding characteristics of Al_0.1CoCrFeNi and Al, the morphology and composition of the welding interface were characterized by a scanning electron microscope(SEM)equipped with energy dispersive spectroscopy(EDS).The results show that explosive welding technology is a good method for joining high-entropy alloys with aluminum. Some cracks perpendicular to the interface are observed in the interfacial melting zone of the welded samples obtained under high-speed collision, but they do not extend to the substrate.The hardness test results show that the overall hardness of the high-entropy alloy increases significantly after explosive welding, while the hardness of the aluminum side does not change significantly.The corrosion test shows that the high entropy alloy has good corrosion resistance.