Hall-Petch relation and boundary strengthening

被引：2489
作者：
Hansen, N [1 ]
机构：
[1] Riso Natl Lab, Dept Mat Res, Ctr Fundamental Res Met Struct Dimens 4, DK-4000 Roskilde, Denmark
来源：
SCRIPTA MATERIALIA | 2004年 / 51卷 / 08期
关键词：
yield stress; flow stress; grain size; dislocation boundaries; nanostructure;
D O I：
10.1016/j.scriptamat.2004.06.002
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The Hall-Petch relation is discussed separately for the yield stress of undeformed polycrystalline metals and for the flow stress of deformed metals. Key structural parameters are the boundary spacing, between grain boundaries in the former case and between dislocation boundaries and high angle boundaries in the latter. An analysis of experimental data supports the Hall-Petch relation for undeformed metals over a grain size range from about 20 nm to hundreds of micrometers. For deformed metals, boundary strengthening is not a constant and the Hall-Petch relation must be modified. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：801 / 806
页数：6
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