Blocking effect of twin boundaries on partial dislocation emission from void surfaces

被引：27
|
作者：
Zhang, Lifeng [1 ]
Zhou, Haofei [1 ]
Qu, Shaoxing [1 ,2 ]
机构：
[1] Zhejiang Univ, Dept Engn Mech, Hangzhou 310027, Zhejiang, Peoples R China
[2] Zhejiang Univ, SMRC, Hangzhou 310027, Zhejiang, Peoples R China
来源：
NANOSCALE RESEARCH LETTERS | 2012年 / 7卷
基金：
中国国家自然科学基金;
关键词：
twin boundaries; void; dislocations; strength; molecular dynamics simulations; SINGLE-CRYSTAL COPPER; MOLECULAR-DYNAMICS; ULTRAHIGH-STRENGTH; MAXIMUM STRENGTH; GROWTH; METALS;
D O I：
10.1186/1556-276X-7-164
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Recent discovery that nanoscale twin boundaries can be introduced in ultrafine-grained metals to improve strength and ductility has renewed interest in the mechanical behavior and deformation mechanisms of these nanostructured materials. By controlling twin boundary spacing, the effect of twin boundaries on void growth is investigated by using atomistic simulation method. The strength is significantly enhanced due to the discontinuous slip system associated with these coherent interfaces. Atomic-scale mechanisms underlying void growth, as well as the interaction between twin boundaries and the void, are revealed in details.
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页码：1 / 8
页数：8
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