The Influence of Grain Size and Temperature on the mechanical Deformation of Nanocrystalline Materials: Molecular Dynamics Simulation

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	The Influence of Grain Size and Temperature on the mechanical Deformation of Nanocrystalline Materials: Molecular Dynamics Simulation
	Wen YH(文玉华); Zhou FX(周富信); Liu YW(刘曰武)
刊名	Chinese Physics
	2001
卷号	10 期号:5 页码:407-412
ISSN号	1009-1963
通讯作者	Wen, YH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China.
中文摘要	Nanocrystalline (nc) materials are characterized by a typical grain size of 1-100nm. The uniaxial tensile deformation of computer-generated nc samples, with several average grain sizes ranging from 5.38 to 1.79nm, is simulated by using molecular dynamics with the Finnis-Sinclair potential. The influence of grain size and temperature on the mechanical deformation is studied in this paper. The simulated nc samples show a reverse Hall-Petch effect. Grain boundary sliding and motion, as well as grain rotation are mainly responsible for the plastic deformation. At low temperatures, partial dislocation activities play a minor role during the deformation. This role begins to occur at the strain of 5%, and is progressively remarkable with increasing average grain size. However, at elevated temperatures no dislocation activity is detected, and the diffusion of grain boundaries may come into play.
学科主题	力学
类目[WOS]	Physics, Multidisciplinary
研究领域[WOS]	Physics
关键词[WOS]	METALS ; TRANSITION ; CLUSTERS
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000169167500009
公开日期	2007-06-15
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/16775]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Wen YH,Zhou FX,Liu YW. The Influence of Grain Size and Temperature on the mechanical Deformation of Nanocrystalline Materials: Molecular Dynamics Simulation[J]. Chinese Physics,2001,10(5):407-412.
APA	文玉华,周富信,&刘曰武.(2001).The Influence of Grain Size and Temperature on the mechanical Deformation of Nanocrystalline Materials: Molecular Dynamics Simulation.Chinese Physics,10(5),407-412.
MLA	文玉华,et al."The Influence of Grain Size and Temperature on the mechanical Deformation of Nanocrystalline Materials: Molecular Dynamics Simulation".Chinese Physics 10.5(2001):407-412.