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采用真空感应熔炼法制备了AZ80-xSm合金(x=0、0.6、1.0、1.5),研究了不同含量的Sm对AZ80镁合金合金组织和力学性能的影响。通过金相显微镜、扫描电镜、透射电镜、EDS、XRD观察和分析了合金的微观形貌和组织结构,测量了合金抗拉强度和伸长率。结果表明,合金中添加稀土元素Sm后晶粒明显细化;生成颗粒状析出相(Al3Sm),减少合金中β相(Mg l7Al l2)的数量,并使连续网状分布的β相断续,Al3Sm相对合金的强化效果明显优于β相,使AZ80镁合金的力学性能得到提高,其中AZ80-1.0Sm合金抗拉强度达到213 MPa,比原始合金提高了21.7%。
The AZ80-xSm alloys (x = 0,0.6,1.0,1.5) were prepared by vacuum induction melting and the effects of different contents of Sm on the microstructure and mechanical properties of AZ80 magnesium alloy were studied. The microstructure and microstructure of the alloy were observed and analyzed by metallographic microscope, scanning electron microscope, transmission electron microscope, EDS and XRD. The tensile strength and elongation of the alloy were measured. The results show that the grain size of the alloy is obviously refined after the addition of rare earth element Sm. The precipitated phase (Al3Sm) is formed, the amount of β phase (Mg1 7 Al l2) in the alloy is reduced, The strengthening effect of Al3Sm relative alloy is obviously better than that of β phase. The mechanical properties of AZ80 magnesium alloy are improved. The tensile strength of AZ80-1.0Sm alloy reaches 213 MPa, which is 21.7% higher than the original alloy.