Hall-Petch relation and boundary strengthening
Hall-Petch relation and boundary strengthening
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DOI：
10.1016/j.scriptamat.2004.06.002
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发表时间：
2004-10-01
影响因子：
6
通讯作者：
Hansen, N
中科院分区：
文献类型：
--
作者：
Hansen, N
分别讨论了未变形多晶金属的屈服应力和变形多晶金属的流变应力的Hall-Petch关系。关键的结构参数是晶界之间的晶界间距和位错晶界与高角晶界之间的晶界间距。对实验数据的分析支持了在20纳米到几百微米的晶粒尺寸范围内未变形金属的Hall-Petch关系。对于变形金属，边界强化不是一个常数，必须修正Hall-Petch关系。(C) 2004材料学报。Elsevier Ltd.出版。版权所有。
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.