IMR OpenIR
Dislocation slip or deformation twinning: confining pressure makes a difference
Xu, DS; Chang, JP; Li, J; Yang, R; Li, D; Yip, S
通讯作者Xu, DS(dsxu@imr.ac.cn)
2004-12-15
发表期刊MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
卷号387页码:840-844
摘要While b.c.c. metals deform plastically by dislocation motion or deformation twinning, the atomistic mechanisms governing the choice of deformation modes are not well established. Molecular dynamics simulations using the Finnis-Sinclair potential were carried out to explore the pressure dependence of the deformation response of b.c.c. molybdenum. The crystal was sheared in (112)[(1) over bar(1) over bar1] under various confining pressures. The homogeneous nucleation stress of deformation twinning was found to increase with increasing confining pressure. Under sufficient pressure (011)[(1) over bar(1) over bar1] dislocations were nucleated instead of twins. Details of the dislocation and twin nucleations were analyzed with the help of the multi-layer generalized stacking fault energies. A two-fault (n = 2) metastable twin state was found, in contrast to previous results using pair potentials. (C) 2004 Published by Elsevier B.V.
关键词twin nucleation molecular dynamics b.c.c. metal Mo pressure
DOI10.1016/j.msea.2004.01.128
收录类别SCI
语种英语
WOS研究方向Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号WOS:000226042400173
出版者ELSEVIER SCIENCE SA
引用统计
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/81429
通讯作者Xu, DS
作者单位1.Chinese Acad Sci, Inst Met Res, Titanium Alloy Lab, Shenyang 110016, Peoples R China
2.MIT, Dept Nucl Engn, Cambridge, MA 02139 USA
3.Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA
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Xu, DS,Chang, JP,Li, J,et al. Dislocation slip or deformation twinning: confining pressure makes a difference[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2004,387:840-844.
APA Xu, DS,Chang, JP,Li, J,Yang, R,Li, D,&Yip, S.(2004).Dislocation slip or deformation twinning: confining pressure makes a difference.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,387,840-844.
MLA Xu, DS,et al."Dislocation slip or deformation twinning: confining pressure makes a difference".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 387(2004):840-844.
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