A coherent polycrystal model for the inverse Hall-Petch relation in nanocrystalline materials

被引：105
|
作者：
Song, HW [1 ]
Guo, SR [1 ]
Hu, ZQ [1 ]
机构：
[1] Acad Sinica, Inst Met Res, State key Lab RSA, Shenyang 110015, Peoples R China
来源：
NANOSTRUCTURED MATERIALS | 1999年 / 11卷 / 02期
关键词：
D O I：
10.1016/S0965-9773(99)00033-1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A coherent polycrystal model for the abnormal grain size dependence is presented. It treats the nanocrystalline material as a coherent precipitate strengthened two-phase alloy in which all the grain boundaries merge into a whole continuous matrix acid each of the grains embeds in the matrix coherently. According to this model, the transition from the normal to the inverse Hall-Fetch relation corresponds to thr role-exchange of the grain bulk and the grain boundary in the deforming mechanism. Theoretical formula based on this model is compared with the available experimental data. Thr results indicate that the model gives an excellent description of the so-called inverse Hall-Petch relation in the nanocrystalline materials. (C) 1999 Acta Metallurgica Inc.
引用
收藏
页码：203 / 210
页数：8
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