Plastic deformation induced extremely fine nano-grains in nickel
文献类型：期刊论文
| 作者 | Guo, X. K.1,2; Luo, Z. P.1; Li, X. Y.1; Lu, K.1 |
| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2021-01-20 |
| 卷号 | 802页码:9 |
| ISSN号 | 0921-5093 |
| 关键词 | Nano-grained metals Microstructure Deformation mechanism Partial dislocation HAADF-STEM |
| DOI | 10.1016/j.msea.2020.140664 |
| 通讯作者 | Luo, Z. P.(zpluo@imr.ac.cn) ; Li, X. Y.(xyli@imr.ac.cn) |
| 英文摘要 | Plastic deformation induced grain refinement was studied in a gradient nanostructure of nickel prepared from the surface mechanical grinding treatment at 77K. With increasing strains and strain rates, the deformation microstructures evolve from dislocation cells to nanolaminated structures of about 20-100 nm thick. With further straining, the nanolaminated structures are fragmented into equiaxed grains with size below 20 nm. The average grain size in the topmost surface layer is about 8 nm and the hardness is as high as 8.5 GPa. Dislocation slip dominated the plastic deformation in grains larger than about 60 nm. Below 60 nm, large amounts of twins formed. The fraction of grains containing twins increases in smaller grains and peaks at about 20 nm, indicating a dominating partial dislocation activity in deformation. With grain size smaller than 20 nm, both dislocation slip and twinning are limited, partial dislocation activities may assist subdivision of grains into few nanometers, as well as facilitate face-centered-cube to hexagonal-close-packed phase transformation in these extremely fine nano-grains. No inverse Hall-Petch relationship is observed at such a small grain size, which may be attributed to grain boundary relaxation during formation of these extremely fine nano-grains by plastic deformation. |
| 资助项目 | Ministry of Science & Technology of China[2017YFA0204401] ; Ministry of Science & Technology of China[2017YFA0700700] ; National Science Foundation of China[51701216] ; National Science Foundation of China[51231006] ; Chinese Academy of Sciences[Zdyz201701] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE SA |
| WOS记录号 | WOS:000612562100003 |
| 资助机构 | Ministry of Science & Technology of China ; National Science Foundation of China ; Chinese Academy of Sciences |
| 源URL | [http://ir.imr.ac.cn/handle/321006/160885]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Luo, Z. P.; Li, X. Y. |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, X. K.,Luo, Z. P.,Li, X. Y.,et al. Plastic deformation induced extremely fine nano-grains in nickel[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,802:9. |
| APA | Guo, X. K.,Luo, Z. P.,Li, X. Y.,&Lu, K..(2021).Plastic deformation induced extremely fine nano-grains in nickel.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,802,9. |
| MLA | Guo, X. K.,et al."Plastic deformation induced extremely fine nano-grains in nickel".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 802(2021):9. |
入库方式： OAI收割
来源：金属研究所
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