Effects of Nd on Microstructure Mechanical Properties of Mg-10Gd-3Y-0.5Zr Alloy

Abstract

The optical microscope, XRD diffraction, scanning electron microscope and electron tensile testing machine equipment, through observing microstructure, tensile test and fracture analysis, study the effects of Nd on Microstructure and properties of the alloy Mg‐Gd‐Y‐Nd‐Zr, and results show that casting alloy organization are the α‐Mg matrix and eutectic phase (Mg5Gd , Mg24Y5 and Mg41Nd5 ) composition. With the increase of Nd content, the eutectic phase of as cast alloy increases gradually, the tensile strength at room temperature increases first and then decreases, while the content of 2wt.% Nd is 216Mpa. After solution treatment and aging, there is no change in the composition of the alloy, but the content is changed. The room temperature and high temperature mechanical properties of the test alloys are obviously improved. When the content of Nd is more than 1wt.%, the tensile strength of the same composition of the alloy at room temperature is lower than 300°C, and the temperature anomaly effect occurs.