Abstract The effect of grain boundary (GB) characteristics (as represented by misorientation angle) on its dynamic response is investigated by sampling a large set of 185 GBs in Ta bi-crystals. These GBs encompass both ordered and disordered structures – typically referred to as metastable structures, in order to reflect the diversity in the local atomic structure observed in realistic GBs. The results reveal four distinct regimes in damage distribution and failure modes as a function of misorientation angle. The above trends also correlate with the variation in the corresponding void nucleation stress.

中文翻译：

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将损伤形核和分布与 Ta 中的晶界特征相关联

摘要 通过对 Ta 双晶中的 185 GB 大组采样，研究了晶界 (GB) 特性（以取向差角表示）对其动态响应的影响。这些 GB 包含有序和无序结构——通常称为亚稳态结构，以反映在现实 GB 中观察到的局部原子结构的多样性。结果揭示了作为错误定向角度的函数的损伤分布和失效模式的四种不同状态。上述趋势也与相应空隙成核应力的变化相关。