Characterization of interfaces in tri-layered brass/steel/brass composites fabricated by casting and hot dipping

Tri-layered brass steel/brass laminated composites were fabricated through hot dipping as well as casting. The chosen temperatures for hot dipping were 1 150 °C and 1 350 °C and for casting was 1 150 °C in addition to performing a heat treatment cycle at 900 °C for 90 min. The characterization results revealed that in the as-cast and the heat-treated samples, the formation of Fe-Zn intermetallic compounds occurred. In addition, with increasing the hot dipping temperature, stronger interfaces were achieved due to easier diffusion at higher temperatures. Moreover, casting without heat treatment was enough to obtain good bonding since the amount of Fe Zn intermetallic compound increased and grain growth occurred.