Plastic deformation of nanocrystalline materials

被引：185
|
作者：
Hahn, H [1 ]
Mondal, P [1 ]
Padmanabhan, KA [1 ]
机构：
[1] INDIAN INST TECHNOL,MADRAS 600036,TAMIL NADU,INDIA
来源：
NANOSTRUCTURED MATERIALS | 1997年 / 9卷 / 1-8期
关键词：
D O I：
10.1016/S0965-9773(97)00135-9
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A model for the deformation of nanocrystalline materials based on grain boundary sliding and formation of mesoscopic glide planes is presented. The experimental result of decreasing hardness with decreasing grain size (inverse Hall-Fetch relationship) found in metals and intermetallics with nanometer grain sizes can be described by this model. For metallic systems a transition from dislocation dominated plastic deformation to grain boundary sliding occurs at a critical grain size when the stress required for dislocation motion/formation becomes larger than for grain boundary sliding. (C) 1997 Acta Metallurgica Inc.
引用
收藏
页码：603 / 606
页数：4
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