Deformation behavior of a twin-roll-cast Mg-6Zn-0.5Mn-0.3Cu-0.02Zr alloy at intermediate temperatures

摘要

The mechanical properties of a twin-roll-cast Mg-6Zn-0.5Mn-0.3Cu-0.02Zr were measured at temperatures from 423 to 523 K. Constant strain rate, strain-rate-change and temperature change tests were employed to characterize the plastic flow behavior of the alloy. It was observed that a in low-strain-rate and high-temperature regime the alloy follows a power-law behavior; however, the power law breaks down at high strain rates and low temperatures. Transient experiments were also conducted to identify the deformation mechanism.