High temperature mechanical behavior of low-pressure sand-cast Mg–Gd–Y–Zr magnesium alloy

The aim of this work is firstly to optimize T6 heat-treatment of low-pressure sand-cast Mg–10Gd–3Y–0.5Zr alloy, and then systematically investigate the mechanical behavior of the T6-treated alloy from room temperature to 300 °C. It turned out that the optimum T6 heat-treatments for the tested alloy are 525 °C × 12 h + 225 °C × 14 h and 525 °C × 12 h + 250 °C × 12 h which integrated age-hardening and tensile properties into account, respectively....