期刊
PHILOSOPHICAL MAGAZINE
卷 89, 期 34-36, 页码 3465-3475出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786430903313690
关键词
dislocations; metals; molecular dynamics; nanograined structures
类别
资金
- European Commission [016710]
- Swiss National Supercomputing Centre
To study deformation mechanisms using molecular dynamics, very high strain rates have to be applied. The effect of lowering the strain rate by two orders of magnitude on the deformation characteristics of nanocrystalline Al was investigated. For the highest strain rate, the onset of dislocation propagation is delayed, resulting in a stress overshoot. With decreasing strain rate the grain-averaged resolved shear stress reduces and cross-slip occurs more frequently. However, even at the lowest applied strain rate the grain boundary network can not accommodate all arriving dislocations, illustrating the challenge to determine the rate-limiting deformation mechanisms for experimental conditions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据