| Deformation behaviour of electrodeposited nanocrystalline Ni with broad grain size distribution | |
Xu WC; Dai PQ; Wu XL(武晓雷)
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| Source Publication | Materials Science and Technology
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| 2010 | |
| Volume | 26Issue:5Pages:591-596 |
| ISSN | 0267-0836 |
| Abstract | In the present work, nanocrystalline Ni (nc-Ni) with a broad grain size distribution (BGSD) of 5-120 nm and an average grain size of 27.2 nm was prepared. The BGSD nc-Ni sample shows a similar strength and good ductility in comparison with electrodeposited nc-Ni with a narrow grain size distribution. The intracrystalline dislocation network was observed in the post-deformed microstructure confirming the conventional intracrystalline dislocation sliding mechanism in BGSD nc-Ni. The uniaxial tensile loading-unloading-loading deformation shows BGSD nc-Ni has the capability to store dislocations in the grain interior, which is very limited compared with that of coarse grained metals. For BGSD nc-Ni, the strain rate sensitivity of flow stress m enhances with decreasing strain rate. At the strain rate of 5 x 10(-6) s(-1), m was estimated to be 0.055. At the corresponding strain rate, the enhanced ductility along with the decreased strength was achievable, indicating activation of other deformation mechanisms, e. g. grain boundary sliding or diffusion. |
| DOI | 10.1179/174328409X448457 |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000278470500014 |
| WOS Keyword | NANOSTRUCTURED METAL ; TENSILE DUCTILITY ; COPPER ; MECHANISMS ; STRENGTH ; NICKEL ; CU |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| Funding Organization | Fuzhou University ; Foundation of Fujian [2008J0145-E0810006] ; National 863 projects of China [2007AA032325] |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/43505 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Dai PQ |
| Recommended Citation GB/T 7714 | Xu WC,Dai PQ,Wu XL. Deformation behaviour of electrodeposited nanocrystalline Ni with broad grain size distribution[J]. Materials Science and Technology,2010,26,5,:591-596. |
| APA | Xu WC,Dai PQ,&武晓雷.(2010).Deformation behaviour of electrodeposited nanocrystalline Ni with broad grain size distribution.Materials Science and Technology,26(5),591-596. |
| MLA | Xu WC,et al."Deformation behaviour of electrodeposited nanocrystalline Ni with broad grain size distribution".Materials Science and Technology 26.5(2010):591-596. |
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