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New Deformation Twinning Mechanism Generates Zero Macroscopic Strain In Nanocrystalline Metals
文献类型：期刊论文
| 作者 | Wu XL(武晓雷) ; Liao XZ; Srinivasan SG; Zhou F; Lavernia EJ; Valiev RZ; Zhu YT
|
| 刊名 | Physical Review Letters
 |
| 出版日期 | 2008 |
| 通讯作者邮箱 | Srivilliputhur@egw.unt.edu ; ytzhu@ncsu.edu |
| 关键词 | Molecular-Dynamics Simulation Aluminum Twins Crystals |
| ISSN号 | 0031-9007 |
| 通讯作者 | Srinivasan, SG (reprint author), Los Alamos Natl Lab, Mat Sci & Technol Div, POB 1663, Los Alamos, NM 87544 USA. |
| 中文摘要 | Macroscopic strain was hitherto considered a necessary corollary of deformation twinning in coarse-grained metals. Recently, twinning has been found to be a preeminent deformation mechanism in nanocrystalline face-centered-cubic (fcc) metals with medium-to-high stacking fault energies. Here we report a surprising discovery that the vast majority of deformation twins in nanocrystalline Al, Ni, and Cu, contrary to popular belief, yield zero net macroscopic strain. We propose a new twinning mechanism, random activation of partials, to explain this unusual phenomenon. The random activation of partials mechanism appears to be the most plausible mechanism and may be unique to nanocrystalline fcc metals with implications for their deformation behavior and mechanical properties. |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | MOLECULAR-DYNAMICS SIMULATION ; ALUMINUM ; TWINS ; CRYSTALS |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000253764500046 |
| 公开日期 | 2009-08-03 ; 2009-09-14 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/26116]  |
| 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 | Wu XL,Liao XZ,Srinivasan SG,et al. New Deformation Twinning Mechanism Generates Zero Macroscopic Strain In Nanocrystalline Metals[J]. Physical Review Letters,2008. |
| APA | 武晓雷.,Liao XZ.,Srinivasan SG.,Zhou F.,Lavernia EJ.,...&Zhu YT.(2008).New Deformation Twinning Mechanism Generates Zero Macroscopic Strain In Nanocrystalline Metals.Physical Review Letters. |
| MLA | 武晓雷,et al."New Deformation Twinning Mechanism Generates Zero Macroscopic Strain In Nanocrystalline Metals".Physical Review Letters (2008). |
入库方式： OAI收割
来源：力学研究所
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