Analysis of the microstructure of an AZ31/AA1050/AA2519 laminate produced using the explosive-welding method

Explosive welding is a solid-state process used for the metallurgical joining of two or more dissimilar metals.In this process, the energy of controlled detonation is utilized to accelerate one metal plate into another.As a result of the collision, an atomic bond is formed.This paper describes a study of a laminate based on the AZ31 magnesium alloy, the AA1050 aluminum alloy and the AA2519 aluminum alloy.The test material was obtained using the method of explosive welding in a direct configuration AZ31/AA2519, with the intermediate layer made of AA1050 alloy previously rolled on the AA2519.The microstructure of the bonds was evaluated using scanning electron (SEM) and transmission electron microscopes with the SAED technique, while the chemical composition was assessed using energy-dispersive spectroscopy (EDS).The mechanical properties were examined with mini-specimen tensile tests and microhardness measurements.Between the joined aluminum alloys, an oxide layer was observed.It was also reported that the obtained joint is free of brittle intermetallic phases.