Effect of grain size dispersion on the strength and plasticity of nanocrystalline metals

被引：10
|
作者：
Malygin, G. A. [1 ]
机构：
[1] Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia
来源：
PHYSICS OF THE SOLID STATE | 2008年 / 50卷 / 06期
关键词：
D O I：
10.1134/S1063783408060103
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The effect of the dispersion of the grain size distribution on the yield stress, ultimate stress, and uniform strain of nanocrystalline metals is analyzed theoretically. It is shown that, as the grain size dispersion increases, the degree of grain boundary hardening (Hall-Petch effect) of nanocrystalline materials decreases, the onset of the grain boundary softening (inverse Hall-Petch effect) shifts to smaller nanograin sizes, and the uniform strain at which necking occurs increases.
引用
收藏
页码：1056 / 1060
页数：5
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