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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。
The damping properties of Mg-Sn alloys with different Sn contents (1% -10%, mass fraction) under different conditions (as-cast (F), solution (T4) performance. The results show that with the increase of Sn content, the strain-dependent damping value (damping factor Q ~ (-1)) of the damping properties of Mg-Sn alloy increases correspondingly. The damping mechanism of Mg-Sn alloy is the interaction of dislocation damping and phase boundary damping, and the damping of phase boundary comes from the frictional damping at the interfacial interface of the eutectic alloy (Mg2Sn and α-Mg). The variation of Q ~ (-1) factor with 1% ~ 5% Sn under high strain amplitude is: T4> F> T6, and the dislocation mechanism dominates. The damping factor Q ~ -1) is: F> T4> T6, the phase boundary friction dominates.