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Deformation Twinning in Nanocrystalline Metals

机译:纳米晶金属中的形变孪晶

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Deformation twins have been oberved in nanocrystalline A! processed by cryogenic ball-milling and in nanocrystalline Cu processed by high-pressure torsion at a very low strain rate. They were formed by partial dislocations emitted from grain boundaries. This paper first reviews experimental evidences and atomistic simulation results on deformation twinning and partial dislocation emissions from grain boundaries and then discusses recent analytical models on the nucleation and growth of deformation twins. These models are compared with experimental results to establish their validity and limitations.
机译:变形双胞胎已被纳为纳米晶体A!通过低温球磨加工而成的纳米晶铜,以及以极低的应变速率通过高压扭转加工而成的纳米晶态铜。它们是由晶界发出的部分位错形成的。本文首先回顾了变形孪晶和晶界部分位错发射的实验证据和原子模拟结果,然后讨论了变形孪晶成核和生长的最新分析模型。将这些模型与实验结果进行比较,以确定其有效性和局限性。

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