ABSTRACT The change in twin-boundary mobility that is caused by twin-boundary segregation was investigated in pure magnesium and four binary solid-solution magnesium alloys (Mg-Ag, Mg-Sn, Mg-Y and Mg-Zn alloys). The damping capacity in the vicinity of { } twin boundaries was measured before and after annealing by nano-dynamic mechanical analysis. The subsequent annealing process led to a lower damping capacity in all magnesium binary alloys, which was in contrast to the results in pure magnesium. This is on account of the segregation of solute atoms in incoherent twin boundaries. The alloying elements, which have the characteristic of a low segregation energy for twin boundaries, effectively prevents the damping capacity degradation.

中文翻译：

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固溶镁合金双边界偏析引起的阻尼能力变化

摘要 在纯镁和四种二元固溶镁合金（Mg-Ag、Mg-Sn、Mg-Y 和 Mg-Zn 合金）中研究了由双边界偏析引起的双边界迁移率的变化。通过纳米动态力学分析测量退火前后{}孪晶边界附近的阻尼能力。随后的退火过程导致所有镁二元合金的阻尼能力降低，这与纯镁的结果相反。这是由于溶质原子在非相干孪晶边界中的偏析。合金元素具有孪晶界偏析能低的特点，有效防止阻尼能力下降。