Molecular dynamics simulation of plastic deformation of nanotwinned copper

doi:10.1063/1.2794884

IMECH-IR > 力学所知识产出(1956-2008)

	Molecular dynamics simulation of plastic deformation of nanotwinned copper
	Cao AJ(曹阿静); Wei YG(魏悦广); Cao, AJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China.
发表期刊	Journal of Applied Physics
	2007
卷号	102 期号:8 页码:083511
ISSN	0021-8979
摘要	The plastic deformation of polycrystalline Cu with ultrathin lamella twins has been studied using molecular dynamics simulations. The results of uniaxial tensile deformation simulation show that the abundance of twin boundaries provides obstacles to dislocation motion, which in consequence leads to a high strain hardening rate in the nanotwinned Cu. We also show that the twin lamellar spacing plays a vital role in controlling the strengthening effects, i.e., the thinner the thickness of the twin lamella, the harder the material. Additionally, twin boundaries can act as dislocation nucleation sites as they gradually lose coherency at large strain. These results indicate that controlled introduction of nanosized twins into metals can be an effective way of improving strength without suppression tensile ductility. (C) 2007 American Institute of Physics.
关键词	Strain-rate Sensitivity Nano-scale Twins Nanocrystalline Metals Dislocations Nucleation Boundaries Mechanism Strength Systems Al
DOI	10.1063/1.2794884
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000250589300028
关键词[WOS]	STRAIN-RATE SENSITIVITY ; NANO-SCALE TWINS ; NANOCRYSTALLINE METALS ; DISLOCATIONS ; NUCLEATION ; BOUNDARIES ; MECHANISM ; STRENGTH ; SYSTEMS ; AL
WOS研究方向	Physics
WOS类目	Physics, Applied
引用统计	被引频次：79[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/33879
专题	力学所知识产出(1956-2008)
通讯作者	Cao, AJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China.
推荐引用方式 GB/T 7714	Cao AJ,Wei YG,Cao, AJ . Molecular dynamics simulation of plastic deformation of nanotwinned copper[J]. Journal of Applied Physics,2007,102,8,:083511.
APA	曹阿静,魏悦广,&Cao, AJ .(2007).Molecular dynamics simulation of plastic deformation of nanotwinned copper.Journal of Applied Physics,102(8),083511.
MLA	曹阿静,et al."Molecular dynamics simulation of plastic deformation of nanotwinned copper".Journal of Applied Physics 102.8(2007):083511.

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