The contribution of grain-boundary activity to plasticity in nanocrystalline Fe - the effect of grain-boundary relaxation

被引：1

作者：

Jang, D ^{[1
]}

Atzmon, M ^{[1
]}

机构：

[1] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

来源：

Metastable, Mechanically Alloyed and Nanocrystalline Materials | 2005年 / 24-25卷

关键词：

nanocrystalline Fe; nanoindentation; hardness; strain-rate sensitivity; grain-boundary activity; low temperature annealing; MECHANICAL-BEHAVIOR; DEFORMATION;

D O I：

10.4028/www.scientific.net/JMNM.24-25.555

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The role of grain boundaries in time-dependent plasticity of nanocrystalline Fe has been investigated. Samples were formed by ball milling of powder at room temperature, and their mechanical behavior was studied by nannoindentation. Anneals at 80 degrees C, which do not affect the grain size, significantly affect the strain-rate sensitivity. This observation is interpreted to be a result of a contribution of grain-boundary activity to plasticity. Grain-boundary relaxation at the annealing temperature strongly influences this contribution.

引用

页码：555 / 558

页数：4

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