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Analysis of strength and ductility of bulk nanostructured Cu and Cu-Al alloys by means of computer modeling

机译：通过计算机建模分析块状纳米结构Cu和Cu-Al合金的强度和延展性

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摘要

The deformation mechanisms responsible for the strength and ductility of nanostructured Cu and Cu-Al alloys processed by high pressure torsion have been analyzed in frames of a model of elastic-plastic medium and using the available experimental data. The income of the Peierls strength, as well as solid solution hardening, dislocation hardening, twinning hardening, taking into account possible annihilation processes has been estimated. It was shown that in the Cu-5 at. % Al alloy annihilation processes contribute to the maintenance of deformation. The material is hardened by the accumulation of dislocations at the twin boundaries, postponing the moment of reaching the ultimate strength. In the Cu-16 at.% Al alloy processes of the annihilation are limited. As a result, the possibility of further deformation is limited and the degree of homogeneous deformation decreases in comparison with the case of the Cu-5 at.% Al alloy. Significantly increased concentration of deformation vacancies contributes to the destruction of the former alloy as well.
机译：在弹塑性介质模型的框架下，利用可获得的实验数据，分析了由高压扭转处理的纳米结构Cu和Cu-Al合金的强度和延展性的变形机理。考虑到可能的ni灭过程，估计了Peierls强度以及固溶硬化，位错硬化，孪生硬化的收益。结果表明，在Cu-5处。 ％的铝合金an灭过程有助于保持变形。由于在双晶边界处的位错积累，材料得到了硬化，从而推迟了达到极限强度的时刻。在Cu-16原子％的Al中，alloy灭的过程受到限制。结果，与Cu-5at。％Al合金的情况相比，进一步变形的可能性受到限制并且均匀变形的程度降低。变形空位集中度的显着增加也导致了前者合金的破坏。

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  • 来源
    《Journal of Materials Research》 |2016年第24期|3850-3859|共10页
  • 作者

    Igor V. Alexandrov; Roza G. Chembarisova; Liliya I. Zainullina; Kun Xia Wei; Wei Wei; Jing Hu;

  • 作者单位

    Department of Physics, Ufa State Aviation Technical University, Ufa 450008, Russia;

    Department of Physics, Ufa State Aviation Technical University, Ufa 450008, Russia;

    Department of Physics, Ufa State Aviation Technical University, Ufa 450008, Russia;

    School of Materials Science and Engineering, Changzhou University, Changzhou 213164, People's Republic of China Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, People's Republic of China;

    School of Materials Science and Engineering, Changzhou University, Changzhou 213164, People's Republic of China Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, People's Republic of China;

    School of Materials Science and Engineering, Changzhou University, Changzhou 213164, People's Republic of China Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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