Dynamic recrystallization model of 30%SiCp/Al composite

Abstract

Using Gleeble-1500D simulator, the high-temperature plastic deformation behavior and dynamic recrystallization behavior of 30%SiCp/Al composite were investigated at 623–773K with strain rate of 0.01–10s−1. The results show that the softening mechanism of the dynamic recrystallization is a feature of high-temperature flow stress–strain curves of the composite, the activation energy of the composite is 272.831kJ/mol. θ–σ and dθ/dσ–σ curves were plotted based on the experimental data to further obtain the critical strain and steady strain of DRX. Then the critical strain model and the steady-state strain model of DRX were set up by regression analysis of experimental data. Based on the results, the volume fraction of DRX as a function of processing variables was established.