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| 论文编号: |
2005014 |
| 论文题目: |
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| 英文论文题目: |
Strain-Induced Grain Refinement of Cobalt During Surface Mechanical Attrition Treatment |
| 作者: |
武晓雷,Tao N,洪友士,Liu G, Xu B,Lu J,Lu K |
| 英文作者: |
Wu Xiaolei, Tao N, Hong Youshi, Liu G, Xu B, Lu J, Lu K |
| 联系作者: |
武晓雷 |
| 英文联系作者: |
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| 外单位作者单位: |
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| 英文外单位作者单位: |
*Chinese Acad Sci, Met Res Inst, Shenyang Natl Lab Mat Sci, New Delhi**Taiyuan **University Technology, Coll Mat Science & Technology***University Tech Troyes, LASMIS, France |
| 发表年度: |
2005 |
| 卷: |
53 |
| 期: |
(3) |
| 页码: |
681-691 |
| 摘要: |
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| 英文摘要: |
The microstructural evolution during surface mechanical attrition treatment of cobalt (a mixture of hexagonal close packed (hep) and face-centered cubic (fcc) phases) was investigated. In order to reveal the mechanism of grain refinement and strain accommodation. The microstructure was systematically characterized by both cross-sectional and planar-view transmission electron microscopy. In the hcp phase, the process of grain refinement. Accompanied by an increase in strain imposed in the surface layer. Involved: (1) the onset of 110 111 deformation twinning, (2) the operation of (1 120) 110 1 0} prismatic and (1 120) (000 1) basal slip, leading to the formation of low-angle dislocation boundaries, and (3) the successive subdivision of grains to a finer and finer scale. Ressulting in the formation of highly misoriented nanocrystalline grains. Moreover. The formation of nanocrystalliies at the grain boundary and triple junction was also observed to occur concurrently with straining. By contrast. The fec phase accommodated strain in a sequence as follows: (1) slip of dislocations by forming intersecting planar arrays of dislocations, (2) {1 1 1} deformation twinning, and (3) the gamma(fcc) --> epsilon(hcp) martensitic phase transformation. The mechanism of grain refinement was interpreted in terms of the structural subdivision of grains together with dynamic recrystallization occurring in the hep phase and the gamma --> E: martensitic transformation in the fcc phase as well. |
| 刊物名称: |
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| 英文刊物名称: |
Acta Materialia |
| 论文全文: |
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| 英文论文全文: |
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| 全文链接: |
thesis/2005年论文PDF/id05_15.pdf |
| 收录类型: |
SCI/EI |
| ISSN: |
1359-6454 |
| 学科: |
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| 英文学科: |
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| 影响因子: |
3.059 |
| 作者所在部门: |
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| 论文出处: |
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| 英文论文出处: |
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| 论文类型: |
AK |
| 英文论文类型: |
AK |
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| 英文参与作者: |
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| 附件下载: |
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