通过显微组织观察、拉伸性能测试及断口分析,研究了时效处理对挤压变形Mg-6%Al-0.5%Ni合金显微组织及拉伸性能的影响。结果表明,挤压变形Mg-6%Al-0.5%Ni合金时效后,强化相粒子可在晶界处以及晶粒内部析出,有效地提高其高温屈服强度和抗拉强度,但导致合金的伸长率降低;合金的拉伸断口呈现韧性和脆性混合断裂特征,而挤压态Mg-6%Al-0.5%Ni合金的拉伸断口均呈现典型的韧性断裂特征。 The effect of aging treatment on the microstructure and tensile properties of Mg-6% Al-0.5% Ni alloy was studied by microstructure observation, tensile test and fracture analysis. The results show that after the aging of extruded Mg-6% Al-0.5% Ni alloy, the strengthened phase particles can be precipitated at the grain boundaries and inside the grains, effectively increasing the yield strength and tensile strength at high temperature, The tensile fracture of the alloy shows a ductile and brittle mixed fracture feature, while the tensile fracture of the as-extruded Mg-6% Al-0.5% Ni alloy shows the typical ductile fracture characteristics.