Significance of the Interlayer in Explosive Welding of Similar and Dissimilar Materials: Review

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Abstract
Explosive welding is a solid-state joining procedure that involves the propulsion of a flyer plate by the explosion of an explosive to produce welds of two or more similar or dissimilar materials. The development of molten intermetallic compounds at the interface degrades the mechanical properties of welded alloys. However, the employment of an interlayer in explosive welding significantly increases the kinetic energy dissipation and prevents the formation of molten intermetallic compounds at the interface, thereby increasing the bonding strength. Earlier researchers employed interlayers having different values of the thickness, yield strength, ductility, and density. The influence of the interlayer on the microstructure and mechanical properties of explosively welded similar and dissimilar alloys is thoroughly reviewed in this study. In addition, the significance of explosive welding in different environments, such as helium, underwater, and gelatin media, is also summarized. Correspondingly, future advancements in joining of materials through explosive welding are forecasted.

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