A Review on Explosive Welding of Copper to Dissimilar Metals: Interfacial Phenomena, Post-Heat Treatment Effects, and Corrosion/Mechanical Behaviors

Explosive welding, as one of the most important solid-state joining processes for producing dissimilar metallic bonds, has gained significant attention in recent years due to its crucial role in manufacturing multilayer composites, heat exchangers, electrical transition joints, and components used in chemical industries. Among various combinations, copper-based joints have attracted particular interest because of their high electrical conductivity, chemical stability, and growing demand in energy and electronic applications. This review article, with a focus on the author's collection of studies and a comparison with the findings of other researchers, provides a comprehensive assessment of interfacial behavior, intermetallic compound (IMC) formation, the effects of post-weld heat treatment, and the mechanical and corrosion performance of Cu/X explosive welded systems. The results indicate that wave morphology, jetting behavior, and the extent of localized melting play decisive roles in bond quality. Furthermore, heat treatment may lead to the growth of brittle IMCs or significantly alter corrosion behavior depending on the bonding counterpart (Al, SS۳۰۴, AISI ۴۱۰). Finally, through reviewing key studies, future pathways are proposed for optimizing welding conditions and controlling IMC evolution.

کلیدواژه ها:

explosive welding ، copper dissimilar joints ، intermetallic compounds ، interface morphology ، heat treatment ، corrosion behavior