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利用磁悬浮真空高频感应加热法制备Mg-4Li、Mg-4Li-3Al、Mg-4Li-3(Al-Si)、Mg-4Li-6(Al-Si)合金铸锭,然后对其进行热挤/压制。采用OM、SEM、电子万能试验机等测试方法,观察并分析轧制后试验合金的显微组织和拉伸变形行为。结果表明:添加Al的轧制态Mg-4Li合金形成了第二相β-Mg_(17)Al_(12)粒子,而添加Al-Si共晶的轧制态Mg-4Li-3(Al-Si)、Mg-4Li-6(Al-Si)合金形成第二相β-Mg_(17)Al_(12)和Mg_2Si粒子,组织晶粒得到细化。轧制态的Mg-4Li、Mg-4Li-3Al、Mg-4Li-3(Al-Si)、Mg-4Li-6(Al-Si)合金的最大抗拉强度分别为310、325、340、370 MPa。
Mg-4Li, Mg-4Li-3Al, Mg-4Li-3 (Al-Si) and Mg-4Li-6 (Al-Si) ingots were prepared by magnetic suspension vacuum induction heating. /suppress. OM, SEM, electronic universal testing machine and other testing methods were used to observe and analyze the microstructure and tensile deformation behavior of the alloy after rolling. The results show that the second phase of β-Mg_ (17) Al_ (12) particles is formed by the addition of Al into the as-rolled Mg-4Li alloy, while the addition of Al-Si eutectic Mg-4Li-3 ) And Mg-4Li-6 (Al-Si) alloy to form the second phase β-Mg 17 Al 12 and Mg 2 Si. The maximum tensile strength of the rolled Mg-4Li, Mg-4Li-3Al, Mg-4Li-3 (Al-Si) and Mg-4Li-6 (Al-Si) alloys were 310, 325, 340, 370 MPa.