Post-rolling annealing of a multilayered Brass/IFS/Brass composite: An evaluation of anisotropy, formability, and mechanical properties

Abstract

The multilayered Brass/IFS/Brass composite was produced through the cold roll bonding (CRB) process and was then subjected to annealing treatments at different temperatures. The microstructure, texture, anisotropy, formability, and mechanical properties of the composite were investigated as a function of annealing temperature. The results revealed that the annealing of the composite at 500 and 650 °C led to full recrystallization in Brass and IFS layers, respectively; this resulted in significant changes in the mechanical properties of the composite. Formation of equiaxed, recrystallized grains instead of elongated, rolled grains led to a decrease in preferred orientation intensity, and consequently, lower anisotropy. In addition, the occurrence of recrystallization and formation of (111) || RD fiber in the fully recrystallized IFS layer were the parameters effective on the higher formability of the annealed composites. Annealing of the composite also led to a decrease in strength and increase in the elongation of the composite. Annealing at 500 and 600 °C was more effective on these variations due to the full recrystallization of the Brass and IFS layers. Moreover, the annealing of the composite resulted in the variation of the fracture from a brittle to a ductile mode.