Microstructure and Mechanical Properties of Mg-12Gd-2Y-Sm-0.5Zr Alloy
The Mg-12Gd-2Y-Sm-0.5Zr (wt. %) alloy was prepared by casting technology and the microstructure and mechanical properties of the alloy have been investigated. It was found that the alloy was composed of a-Mg matrix, Mg5Gd phase and dispersed long-period ordered β' precipitates. With temperature increasing from 20 to 300 °C, the tensile strength increased and reached to the maximum strength at 300°C, namely 316.3 MPa. The value was superior to those of the conventional heat-resistant magnesium. The improved strain hardening and critical crack propagation stress were the key factors for experimental alloy possessed anomalous temperature dependence of tensile strength.
K. J. Li and Q. N. Li, "Microstructure and Mechanical Properties of Mg-12Gd-2Y-Sm-0.5Zr Alloy", Advanced Materials Research, Vols. 168-170, pp. 1001-1005, 2011