Hot Deformation Behavior of the 30%Mo/Cu-Al<sub>2</sub>O<sub>3</sub> Composite Prepared by Vacuum Hot-Pressed Sintering

Hot deformation behavior of the 30%Mo/Cu-Al 2 O 3 composite was investigated by hot compression tests on Gleeble-1500D thermal simulator in the temperature ranges of 450~750°C and the strain rate ranges of 0.01~5s -1 , as the total strain is 0.7. The results show that 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 the composite, and the calculated flow stresses are in good agreement with the high- temperature deformation experimental results.