Knowledge Management System of Institue of Mechanics, CAS
| 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.
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| 发表期刊 | Chinese Physics
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| 2001 | |
| 卷号 | 10期号:5页码:407-412 |
| ISSN | 1009-1963 |
| 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. |
| 学科领域 | 力学 |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000169167500009 |
| 关键词[WOS] | METALS ; TRANSITION ; CLUSTERS |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Multidisciplinary |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/16775 |
| 专题 | 力学所知识产出(1956-2008) |
| 通讯作者 | Wen, YH (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 | 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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