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
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ISSN | 0921-5093 |
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 |
DOI | 10.1016/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 |
推荐引用方式 GB/T 7714 | 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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