采用多向锻造及人工时效制备高强度高塑性GW94合金。该合金具有完全再结晶组织和亚微米级超细等轴晶,其抗拉强度、屈服强度及伸长率分别为377MPa,295MPa和21.7%。与传统挤压工艺相比,多向锻造显著提高材料的塑性。在573K下拉伸时,该合金表现出超塑性,其最大伸长率为450%。GW94合金的高强度和高塑性是由完全再结晶晶粒和在晶界处动态析出Mg5(Gd,Y)纳米颗粒的共同作用。 Multi-direction forging and artificial aging prepared by high strength and high plasticity GW94 alloy. The alloy has completely recrystallized microstructure and submicron superfine equiaxed grain, and its tensile strength, yield strength and elongation are respectively 377MPa, 295MPa and 21.7%. Compared with the traditional extrusion process, multi-directional forging significantly improve the plasticity of the material. When stretched at 573 K, the alloy exhibits superplasticity with a maximum elongation of 450%. The high strength and high ductility of the GW94 alloy is due to the combination of fully recrystallized grains and the dynamic precipitation of Mg5 (Gd, Y) nanoparticles at the grain boundaries.