Dislocation slip or deformation twinning: confining pressure makes a difference

doi:10.1016/j.msea.2004.01.128

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
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/321006/80942
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.