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采用拉伸试验、金相实验和XRD等方法测试和分析了AZ80镁合金在铸态、T4态及T6态的力学性能和显微组织。结果表明:T4处理使铸态AZ80镁合金组织中沿晶界处的网状β相分解并溶入到α-Mg基体中,T6处理会析出β-Mg17Al12相,有连续析出和不连续析出,T6处理后材料的抗拉强度和屈服强度最高,T4处理后的断后伸长率较铸态和T6态高。
Tensile test, metallographic experiment and XRD were used to test and analyze the mechanical properties and microstructure of AZ80 magnesium alloy in as-cast, T4 and T6 states. The results show that: the T4 treatment causes the β-phase decomposition and dissolution into the α-Mg matrix along the grain boundary in the as-cast AZ80 magnesium alloy, the β-Mg17Al12 phase precipitates from the T6 treatment, with continuous precipitation and discontinuous precipitation, After T6 treatment, the tensile strength and yield strength of the material are the highest, the elongation after the T4 treatment is higher than the as-cast and T6 state.