Molecular Dynamics Study Of The Mechanical Behavior Of Nickel Nanowire: Strain Rate Effects
文献类型：期刊论文
| 作者 | Wen YH(文玉华); Zhu ZZ; Zhu RC(朱如曾)
|
| 刊名 | Computational Materials Science
 |
| 出版日期 | 2008 |
| 页码 | 553-560 |
| 通讯作者邮箱 | yhwen@xmu.edu.cn ; zzhu@xmu.edu.cn |
| 关键词 | Nanowire Mechanical Properties Strain Rate Molecular Dynamics Tensile Deformation Metallic Nanowires Amorphization Simulation Copper Size |
| ISSN号 | 0927-0256 |
| 通讯作者 | Zhu, ZZ (reprint author), Xiamen Univ, Dept Phys, Xiamen 361005, Peoples R China. |
| 中文摘要 | We present the analysis of uniaxial deformation of nickel nanowires using molecular dynamics simulations, and address the strain rate effects on mechanical responses and deformation behavior. The applied strain rate is ranging from 1 x 10(8) s(-1) to 1.4 x 10(11) s(-1). The results show that two critical strain rates, i.e., 5 x 10(9) s(-1) and 8 x 10(10) s(-1), are observed to play a pivotal role in switching between plastic deformation modes. At strain rate below 5 x 10(9) s(-1), Ni nanowire maintains its crystalline structure with neck occurring at the end of loading, and the plastic deformation is characterized by {111} slippages associated with Shockley partial dislocations and rearrangements of atoms close to necking region. At strain rate above 8x10(10) s(-1), Ni nanowire transforms from a fcc crystal into a completely amorphous state once beyond the yield point, and hereafter it deforms uniformly without obvious necking until the end of simulation. For strain rate between 5 x 10(9) s(-1) and 8 x 10(10) s(-1), only part of the nanowire exhibits amorphous state after yielding while the other part remains crystalline state. Both the {111} slippages in ordered region and homogenous deformation in amorphous region contribute to the plastic deformation. (C) 2007 Published by Elsevier B.V. |
| 类目[WOS] | Materials Science, Multidisciplinary |
| 研究领域[WOS] | Materials Science |
| 关键词[WOS] | TENSILE DEFORMATION ; METALLIC NANOWIRES ; AMORPHIZATION ; SIMULATION ; COPPER ; SIZE |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000254338800017 |
| 公开日期 | 2009-08-03 ; 2009-09-14 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/26096]  |
| 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,Zhu ZZ,Zhu RC. Molecular Dynamics Study Of The Mechanical Behavior Of Nickel Nanowire: Strain Rate Effects[J]. Computational Materials Science,2008:553-560. |
| APA | 文玉华,Zhu ZZ,&朱如曾.(2008).Molecular Dynamics Study Of The Mechanical Behavior Of Nickel Nanowire: Strain Rate Effects.Computational Materials Science,553-560. |
| MLA | 文玉华,et al."Molecular Dynamics Study Of The Mechanical Behavior Of Nickel Nanowire: Strain Rate Effects".Computational Materials Science (2008):553-560. |
入库方式： OAI收割
来源：力学研究所
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