Changes of Mechanical and Thermal Properties of a Zn-Al Alloy due to High Strain-Rate Superplastic Deformation

In this study, the high strain-rate superplastic deformation was carried out for a Zn-Al alloy by tensile tests at room temperature and high temperatures. Before and after the tests, the dynamic hardness and the thermal conductivity were evaluated, and the temperature increasing rate and the m value due to high strain-rate superplastic deformation were also evaluated. The temperature increasing rate in the case of low strain-rate superplastic deformation at high temperature was lower and the m value in the case of the test condition was higher. The dynamic hardness in the case of low strain-rate superplastic deformation at high temperature was lower and the thermal conductivity in the case of high strain-rate superplastic deformation at high temperature was higher.