Compression deformation behavior of 30%Mo/Cu-Al2O3 composite at elevated temperature

Using the Gleeble-1500D thermal simulator, the high-temperature plastic deformation behavior and processing map of 30%Mo/Cu-Al2O3 composite were investigated at 450-750°C with the strain rate of 0.01-5s-1 and total strain of 0.7. The results show that the softening mechanism of dynamic recrystallization is a feature of high-temperature flow stress-strain curves of 30%Mo/Cu-Al2O3 composite, and the peak stress increases with the decreased deformation temperature or the increased strain rate. Based on the true stress-strain curves, the established constitutive equation represents the high-temperature flow behavior of 30%Mo/Cu-Al2O3 composite, and the calculated results of the flow stress are in good agreement with the experimental results of the high-temperature deformation. Meanwhile, the obtained processing map of dynamic material modeling is used to analyze the deformation mechanism and the destabilization mechanism of 30%Mo/Cu-Al2O3 composite, the optimal deformation processing parameters of the deformation temperatures rang and the strain rates rang are 650-750°C, and 0.01-0.1 s-1, respectively.