Microstructure of the interface zone after explosive welding and further annealing of A1050/Ni201 clads using various joining conditions

Explosive welding is a joining method suitable for materials difficult or impossible to connect using traditional welding techniques. In this work, the microstructure details occurring in the neighborhood of the aluminum (A1050) and nickel (Ni201) alloys’ interfaces in explosive welds were described. It was shown that using appropriate welding conditions, although the mutual localization of the colliding plates was different, the microstructure of the bonded zone did not change. Moreover, further annealing of the samples at 500 °C revealed the microstructure transformation occurring as a result of the diffusion phenomena. This in turn provides the details essential in proper designing of the multilayers of metallic–intermetallic Al/Ni composites.