On the Recrystallization of Cu–Al Alloy Annealed by Two-step Annealing

The TTT diagram for the recrystallization of a cold-rolled Cu-10 at%Al alloy was depicted from the X-ray diffraction data. On the basis of the TTT diagram, two-step annealing procedures were adopted for investigating the effects of recovery and short-range ordering on the recrystallization-texture development. Application of a preliminary annealing (primary annealing) at temperatures below 583 K prior to the recrystallization annealing (at 673 K for 480 s) enhanced the development of the major component of the recrystallization texture and decreased the intensity of the minor one. The primary annealing at 503 K showed the most remarkable effect on the recrystallization. A short time primary annealing at this temperature suppressed the development of the major component, whereas the prolonged one enhanced it. This may be due to the competition of the recrystallization with the short-range ordering in the recrystallization front region. A slight increase of the major texture component in the specimens primarily annealed at temperatures higher than 583 K, may have arisen from its nucleation prior to that of the other components.