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首页> 外文期刊>Philosophical Magazine Letters >The characterization of dislocation-nanocluster interactions in Al-Mg-Si(-Cu/Ag) alloys
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The characterization of dislocation-nanocluster interactions in Al-Mg-Si(-Cu/Ag) alloys

机译：Al-Mg-Si（-Cu / Ag）合金中位错-纳米簇相互作用的表征

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摘要

The quantification of the interaction between nanoclusters and dislocation motion has received relatively little experimental or theoretical research. In this work, the relationship between nanoclusters and dislocations was investigated by conducting tensile tests at different temperatures for a variety of nanoclusters in Al-Mg-Si alloys. Further, the nanoclusters were characterized by 3D atom probe. The normalized energy required for a dislocation to shear through a nanocluster, g_o, was estimated by using the results from the tensile tests and thermal activation theory. It was possible to characterize differences in nanoclusters for different ageing times as well as changes due to the addition of Cu or Ag. Specifically, it was found that the nanoclusters that formed at 293 K could be differentiated from those formed at 393 K, even after correcting for the nanocluster size. Finally, it was found that the addition of small amounts of Cu or Ag fundamentally altered the dislocation-nanocluster interaction.
机译：纳米团簇与位错运动之间的相互作用的定量研究相对较少，只有实验或理论研究。在这项工作中，通过在不同温度下对Al-Mg-Si合金中的各种纳米团簇进行拉伸测试，研究了纳米团簇与位错之间的关系。此外，通过3D原子探针对纳米团簇进行了表征。通过使用拉伸试验和热活化理论的结果，估算了位错剪切通过纳米团簇所需的归一化能量g_o。可以表征不同老化时间下纳米团簇的差异以及由于添加铜或银而引起的变化。具体而言，发现即使校正了纳米团簇的大小，在293 K下形成的纳米团簇也可以与在393 K下形成的纳米团簇区分开。最后，发现添加少量的铜或银从根本上改变了位错-纳米簇的相互作用。

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