IMECH-IR  > 力学所知识产出(1956-2008)
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); Wen, YH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China.
Source PublicationChinese Physics
2001
Volume10Issue:5Pages:407-412
ISSN1009-1963
AbstractNanocrystalline (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.
Subject Area力学
Indexed BySCI ; EI
Language英语
WOS IDWOS:000169167500009
WOS KeywordMETALS ; TRANSITION ; CLUSTERS
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/16775
Collection力学所知识产出(1956-2008)
Corresponding AuthorWen, YH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China.
Recommended Citation
GB/T 7714
Wen YH,Zhou FX,Liu YW,et al. 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,&Wen, YH .(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.
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