| Strong Strain Hardening in Nanocrystalline Nickel | |
Wu XL(武晓雷) ; Zhu YT; Wei YG(魏悦广); Wei Q
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| Source Publication | Physical Review Letters
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| 2009 | |
| Volume | 103Issue:20Pages:205504 |
| ISSN | 0031-9007 |
| Abstract | Low strain hardening has hitherto been considered an intrinsic behavior for most nanocrystalline (NC) metals, due to their perceived inability to accumulate dislocations. In this Letter, we show strong strain hardening in NC nickel with a grain size of 20 nm under large plastic strains. Contrary to common belief, we have observed significant dislocation accumulation in the grain interior. This is enabled primarily by Lomer-Cottrell locks, which pin the lock-forming dislocations and obstruct islocation. motion. These observations may help with developing strong and ductile NC metals and alloys. |
| Subject Area | 本构关系 |
| DOI | 10.1103/PhysRevLett.103.205504 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000271864600029 |
| WOS Keyword | MOLECULAR-DYNAMICS SIMULATION ; HIGH-TENSILE DUCTILITY ; SINGLE-CRYSTALS ; METALS ; STRENGTH ; COPPER ; DEFORMATION ; NANOSCALE ; JUNCTIONS ; MECHANISM |
| WOS Research Area | Physics |
| WOS Subject | Physics, Multidisciplinary |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/28757 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Wu XL(武晓雷) |
| Recommended Citation GB/T 7714 | Wu XL,Zhu YT,Wei YG,et al. Strong Strain Hardening in Nanocrystalline Nickel[J]. Physical Review Letters,2009,103,20,:205504. |
| APA | 武晓雷,Zhu YT,魏悦广,&Wei Q.(2009).Strong Strain Hardening in Nanocrystalline Nickel.Physical Review Letters,103(20),205504. |
| MLA | 武晓雷,et al."Strong Strain Hardening in Nanocrystalline Nickel".Physical Review Letters 103.20(2009):205504. |
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