DETWINNING BEHAVIOR INDUCED BY LOCAL SHEAR STRAIN IN NANOTWINNED Cu
文献类型：期刊论文
| 作者 | Bai Jingsheng; Lu Qiuhong; Lu Lei |
| 刊名 | ACTA METALLURGICA SINICA
 |
| 出版日期 | 2016-04-11 |
| 卷号 | 52期号:4页码:491-496 |
| 关键词 | Cu nanoscale twin cold rolling detwinning shear strain |
| ISSN号 | 0412-1961 |
| 通讯作者 | Lu Lei(llu@imr.ac.cn) |
| 英文摘要 | Nanotwinned materials have attracted widespread attention due to their superior mechanical properties, such as high strength, good ductility and work hardening. Experimental and molecular dynamics (MD) simulation results had indicated that there are three distinctly different dislocation-mediated deformation mechanisms in nanotwinned metals, namely dislocation pile-up against and slip transfer across twin boundaries (TBs), Shockley partials gliding on twin boundaries leading to twin boundary migration, and threading dislocations slip confined by neighboring twin boundaries. However, most of the previous studies are focused on the homogenous plastic deformation under tension and compression tests, the non-homogenous deformation and its deformation mechanism, especially under low strain and complex stress condition/confined condition, of nanotwinned metals are still not explored so far. In this study, the electrodeposited bulk Cu samples with preferentially oriented nanotwins were cold rolled with the normal of the rolling plane parallel to the growth direction (ND//GD) to strain of 15% at room temperature. The microstructure features of as-rolled Cu were investigated by SEM and TEM. Microstructure evolution indicates that many detwinning bands appeared in the direction about 30 degrees similar to 45 degrees with respect to the rolling direction, which is the direction with the largest shearing stress. The twin lamellae in the detwinning bands coarsened obviously. Based on calculation of the local shear strain and strain gradient of TBs in a selected detwinning band, it indicates that the maximum shear strain occurs in the middle of the deformation bands, and its detwinning mechanism is directly related the localized shear strains (gamma). The twin lamellae in the detwinning bands were coarsened obviously. When 0.3 |
| 资助项目 | National Basic Research Program of China[2012CB932202] ; National Natural Science Foundation of China[51420105001] ; National Natural Science Foundation of China[51371171] ; National Natural Science Foundation of China[51471172] |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000374809600013 |
| 出版者 | SCIENCE PRESS |
| 资助机构 | National Basic Research Program of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/122067]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Lu Lei |
| 作者单位 | Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bai Jingsheng,Lu Qiuhong,Lu Lei. DETWINNING BEHAVIOR INDUCED BY LOCAL SHEAR STRAIN IN NANOTWINNED Cu[J]. ACTA METALLURGICA SINICA,2016,52(4):491-496. |
| APA | Bai Jingsheng,Lu Qiuhong,&Lu Lei.(2016).DETWINNING BEHAVIOR INDUCED BY LOCAL SHEAR STRAIN IN NANOTWINNED Cu.ACTA METALLURGICA SINICA,52(4),491-496. |
| MLA | Bai Jingsheng,et al."DETWINNING BEHAVIOR INDUCED BY LOCAL SHEAR STRAIN IN NANOTWINNED Cu".ACTA METALLURGICA SINICA 52.4(2016):491-496. |
入库方式： OAI收割
来源：金属研究所
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