Abstract
The hot-deformation behavior of composites consisting of an AA2124 matrix reinforced with 15 vol% of SiC whiskers has been studied over a temperature range of 200 to 530 °C and a strain rate range of 1.32 × 10 −3 to 2.38 s −1. Detailed analyses of flow curves and deformed microstructures were made to identify the hot-recovery mechanism of the composites. The critical strain, ε c, for dynamic recrystallization of the composites was also evaluated by the work-hardening rate, θ, and effective stress, σ, from the flow curves. It was found that the hot-recovery mechanism of the composites was dynamic recrystallization and the addition of SiC whiskers promoted nucleation of the dynamic recrystallization. The relationship between the critical strain, ε c, and peak strain, ε P, of the composites was ε c ≈ 0.52 ε P.
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