Extrusion experiments with various extrusion ratio and aging technology have been carried out to investigate the evolution of the microstructure and mechanical properties of Mg–10Gd–3Y–2Ag–0.4Zr (wt%, GWQ1032K) alloy. The results show that hot extrusion at 400 °C with an extrusion ratio of 16 significantly refines the grain and improves its mechanical properties. Precipitates at grain boundaries increase as the extrusion ratio increases, which indicates that Gd and Ag are mainly the enriched elements at the segregation and Ag can promote the precipitation of the second phase during the extrusion. The reason for this phenomenon is the case that the increase in extrusion ratio makes the strain energy and the precipitation formation activation energy increase. Meanwhile, the product has excellent tensile strength (392 MPa) after refining, which increases by 99.0% compared with that of the original product (197 MPa); the yield strength and ductility increases in varying degrees. After extrusion and aging treatment at 180 °C for 32 h, the product can meet the highest ultimate tensile strength (477 MPa). In addition, the fracture characteristics of the cast alloy is transferred from inter-granular fracture to inter-granular and quasi-cleavage fracture after two-step treatment of extrusion and aging.

已经进行了各种挤压比和时效技术的挤压实验，以研究Mg-10Gd-3Y-2Ag-0.4Zr（wt％，GWQ1032K）合金的微观组织和力学性能。结果表明，在400°C下以16的挤出比进行热挤出可显着细化晶粒并改善其机械性能。随着挤压比的增加，晶界的析出物增加，这表明Gd和Ag主要是偏析处的富集元素，而Ag可以促进挤压过程中第二相的析出。产生这种现象的原因是，挤出比的增加使得应变能和沉淀形成活化能增加。同时，精制后的产品具有优异的抗张强度（392 MPa），与原产品（197 MPa）相比增加了99.0％；屈服强度和延展性均有不同程度的提高。经过180°C的挤压和时效处理32小时后，该产品可以满足最高的极限拉伸强度（477 MPa）。另外，经过两步挤压和时效处理后，铸造合金的断裂特性从晶间断裂转变为晶间和准裂解断裂。