Partial-dislocation-mediated processes in nanocrystalline Ni with nonequilibrium grain boundaries

被引：89
|
作者：
Wu, X. L. [1 ]
Zhu, Y. T.
机构：
[1] Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100080, Peoples R China
[2] Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA
来源：
APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 03期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.2227639
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The partial-dislocation-mediated processes have so far eluded high-resolution transmission electron microscopy studies in nanocrystalline (nc) Ni with nonequilibrium grain boundaries. It is revealed that the nc Ni deformed largely by twinning instead of extended partials. The underlying mechanisms including dissociated dislocations, high residual stresses, and stress concentrations near stacking faults are demonstrated and discussed. (c) 2006 American Institute of Physics.
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