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

Abstract

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. Published by Elsevier Ltd. on behalf of Acta Materialia Inc.