Microstructure, mechanical and damping properties of Mg–Er–Gd–Zn alloy reinforced with stacking faults

A novel Mg–4Er–4Gd–1Zn alloy was prepared by combined processes of direct-chill semi-continuous casting, heat-treatment and hot-extrusion. The alloy has good mechanical properties at room temperature due to the formation of profuse nano-spaced basal plane stacking faults (SFs). The ultimate tensile strength (UTS), tensile yield strength (TYS) and elongation are 358 MPa, 253 MPa and 20%, respectively. The Mg–4Er–4Gd–1Zn alloy with SFs also...