【摘要】 研究了不同的Sn含量（1%¹0%,质量分数）的Mg-Sn合金在不同状态下（铸态（F）、固溶态（T4）、固溶+时效态（T6））的阻尼性能。结果表明随着Sn含量的增加,Mg-Sn合金阻尼性能中与应变相关的阻尼值(阻尼因子Q^-1)会相应的增加。Mg-Sn合金阻尼机理为位错阻尼和相界阻尼的共同作用,相界阻尼来自于合金中层片状共晶组织（Mg2Sn与α-Mg）相界面摩擦阻尼。高应变振幅下,含1%⁵%Sn的Q^-1因子变化规律为:T4>F>T6,位错机制占主导地位;含7%¹0%Sn的阻尼因子Q^-1变化规律为:F>T4>T6,相界面摩擦阻尼占主导地位。更多还原

【Abstract】 The damping properties of Mg-Sn alloys with different Sn addition（ 1%-10%,mass fraction） and in different states（ as-cast（ F）,solid solution（ T4）,solution + aging（ T6）） were researched. The results show that with increasing Sn addition,the strain-related damping values( damping factor Q^-1) of Mg-Sn alloys increase correspondingly. The damping mechanism of Mg-Sn alloy is the interaction between dislocation damping and phase boundary damping. The phase boundary damping is caused by the eutectic phase（ Mg2 Sn and α-Mg）interfacial friction. At high strain level,Q^-1factor values for 1%-5% Sn are increased the order of T4 > F > T6,which indicates the damping mechanism is dominated by dislocation; for 7%-10% Sn,the values of damping factor Q^-1are increased the order of F > T4 > T6,which indicates that interfacial friction damping played the dominant effect.更多还原