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采用氩气保护条件下真空熔炼的方法熔炼出MgZn_x Y_(1.33x)(x=1~4at.%)合金,并运用SEM、XRD及阻尼测试方法对合金的组织结构和阻尼性能进行分析和讨论。结果表明,合金中主要包含镁基体和长周期堆垛相,随着Zn和Y含量的增加,合金中晶粒逐步细化,长周期堆垛相含量增多,并且针状或带状的长周期堆垛相互穿插在一起。阻尼测试的结果表明,长周期堆垛相的增加有利于镁合金的阻尼性能,Mg-7%Zn-12.8%Y合金在高应变阶段阻尼最优,其阻尼值达到0.04。
The alloy MgZn_x Y_ (1.33x) (x = 1 ~ 4at.%) Was melted by vacuum smelting under argon atmosphere. The microstructure and damping properties of the alloy were analyzed and discussed by SEM, XRD and damping test . The results show that the alloy mainly contains magnesium matrix and long-period stacking phase. With the increase of Zn and Y content, the grain size of the alloy is gradually refined, the long-period stacking phase content increases, and the long-period of needle or ribbon Stacking interspersed with each other. The results of damping test show that the increase of long-period stacking phase is in favor of the damping capacity of magnesium alloy. The damping of Mg-7% Zn-12.8% Y alloy is the best in high strain stage and its damping value reaches 0.04.