Flow behavior and processing map of as-cast Mg–10Gd–4.8Y–2Zn–0.6Zr alloy

Compression tests of Mg–10Gd–4.8Y–2Zn–0.6Zr alloy have been performed in the compression temperature range from 350 °C to 500 °C and the strain rate range from 0.001 s−1 to 1 s−1. The flow behavior has been investigated by the stress–strain behavior and dynamic recrystallization (DRX) behavior. The critical condition and the kinetics of DRX of the alloy deformed at the temperature of 500 °C and the strain rate of 0.01 s−1 were determined. The processing maps at different strains were established, which illustrated that the processing maps of the alloy was sensitive to strains. The optimum parameters for hot working of the alloy has been determined according to the processing map and microstructure at the true strain of 0.7, and that was the deformation temperature of 500 °C and the strain rate of 0.01 s−1.