Abstract Molecular dynamics method is performed for analyzing the relationship of the twin boundary and grain boundary on the cyclic response of nanotwinned Cu. Results show that the strength difference among the grain boundary, the twin boundary and the variation of dislocation density are nearly 2-2.5 times. We predict twin boundary is only a factor that affects the stable response, however, the dislocation form and the time to reach stability is caused by the grain boundary. Furthermore, the phenomenon of cyclic hardening is found in all the nanotwinned Cu samples.

中文翻译：

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双晶界和晶界对拉伸预变形高度取向纳米孪晶铜循环响应的影响：分子动力学模拟

摘要 采用分子动力学方法分析孪晶界和晶界对纳米孪晶Cu循环响应的关系。结果表明，晶界、孪晶界的强度差异和位错密度的变化接近2-2.5倍。我们预测孪晶界只是影响稳定响应的一个因素，然而，位错形式和达到稳定的时间是由晶界引起的。此外，在所有纳米孪晶铜样品中都发现了循环硬化现象。