Knowledge Management System of Institue of Mechanics, CAS
| Molecular dynamics simulation of plastic deformation of nanotwinned copper | |
Cao AJ(曹阿静) ; Wei YG(魏悦广); Cao, AJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China.
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| Source Publication | Journal of Applied Physics
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| 2007 | |
| Volume | 102Issue:8Pages:083511 |
| ISSN | 0021-8979 |
| Abstract | The plastic deformation of polycrystalline Cu with ultrathin lamella twins has been studied using molecular dynamics simulations. The results of uniaxial tensile deformation simulation show that the abundance of twin boundaries provides obstacles to dislocation motion, which in consequence leads to a high strain hardening rate in the nanotwinned Cu. We also show that the twin lamellar spacing plays a vital role in controlling the strengthening effects, i.e., the thinner the thickness of the twin lamella, the harder the material. Additionally, twin boundaries can act as dislocation nucleation sites as they gradually lose coherency at large strain. These results indicate that controlled introduction of nanosized twins into metals can be an effective way of improving strength without suppression tensile ductility. (C) 2007 American Institute of Physics. |
| Keyword | Strain-rate Sensitivity Nano-scale Twins Nanocrystalline Metals Dislocations Nucleation Boundaries Mechanism Strength Systems Al |
| DOI | 10.1063/1.2794884 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000250589300028 |
| WOS Keyword | STRAIN-RATE SENSITIVITY ; NANO-SCALE TWINS ; NANOCRYSTALLINE METALS ; DISLOCATIONS ; NUCLEATION ; BOUNDARIES ; MECHANISM ; STRENGTH ; SYSTEMS ; AL |
| WOS Research Area | Physics |
| WOS Subject | Physics, Applied |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/33879 |
| Collection | 力学所知识产出(1956-2008) |
| Corresponding Author | Cao, AJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China. |
| Recommended Citation GB/T 7714 | Cao AJ,Wei YG,Cao, AJ . Molecular dynamics simulation of plastic deformation of nanotwinned copper[J]. Journal of Applied Physics,2007,102,8,:083511. |
| APA | 曹阿静,魏悦广,&Cao, AJ .(2007).Molecular dynamics simulation of plastic deformation of nanotwinned copper.Journal of Applied Physics,102(8),083511. |
| MLA | 曹阿静,et al."Molecular dynamics simulation of plastic deformation of nanotwinned copper".Journal of Applied Physics 102.8(2007):083511. |
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