中文

考虑准静态变形下晶界态的多晶集合体两相模型

介观与纳米尺度物理 2019-09-10 v4 软凝聚态物质 统计力学

摘要

在 [arxiv:1803.08247[cond-mat.mtr-sci], arxiv:1805.08623[cond-mat.mtr-sci]] 中提出的准静态塑性变形下多晶材料流变应力(包括屈服强度)的统计理论,在两相模型框架内得到发展。对具有 BCC(α相 Fe)、FCC(Cu、Al、Ni)和 HCP(α-Ti、Zr)晶格且在 T=300K、具有不同晶界(第二)相值的样品,获得了广义 Hall-Petch 关系的解析与图示形式。样品屈服强度的最大值及相应极值晶粒尺寸通过第二相的改变而发生偏移。屈服强度在 100–350K 范围内的温度依赖性(以 Al 为例)显示,对于紧密堆积的纳米晶样品,其随温度升高而增大。样品中第二相的增大会中和这一性质。

关键词

引用

@article{arxiv.1809.03628,
  title  = {Two-phase model of the polycrystalline aggregate with account for grain-boundary states under quasi-static deformation},
  author = {Alexander A. Reshetnyak and Yurii P. Sharkeev},
  journal= {arXiv preprint arXiv:1809.03628},
  year   = {2019}
}

备注

5 pages, 6 figures, 2 tables, contribution to the Proceedings of the International Conference Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 1-5, October, Tomsk, Russia; presentation improved; acknowledgements added, published version, minor corrections. arXiv admin note: text overlap with arXiv:1908.09338