Modelling the strongest grain size in nanocrystalline FCC metals

被引：3
|
作者：
Huang, Mingxin [1 ]
Bouaziz, Olivier [2 ,3 ]
van der Zwaag, Sybrand [4 ]
机构：
[1] Univ Hong Kong, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China
[2] ArcelorMittal Res, F-57283 Maizieres Les Metz, France
[3] CNRS, UMR7633, Ctr Mat Mines Paris, F-91003 Evry, France
[4] Delft Univ Technol, Fac Aerosp Engn, NL-2629 HS Delft, Netherlands
来源：
MATERIALS LETTERS | 2011年 / 65卷 / 19-20期
关键词：
Nanocrystalline; Strength; Abnormal Hall-Petch; STEADY-STATE DEFORMATION; IRREVERSIBLE THERMODYNAMICS; PLASTIC-DEFORMATION; CARBON-STEELS; BEHAVIOR; STRESS; COPPER;
D O I：
10.1016/j.matlet.2011.06.104
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A physical model is proposed to predict the critical grain size at which nanocrystalline FCC metals reach a maximum steady state flow stress. The model considers that nanocrystalline metals are composed of two phases. One is the grain boundary phase and the other is the grain interior phase. The grain boundary phase has specific deformation mechanism different to the grain interior phase. The critical grain size with the maximum steady state flow stress is predicted to decrease with deformation temperature and to increase with strain rate. Both normal and abnormal Hall-Petch relations can be described simultaneously by the model. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：3128 / 3130
页数：3
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