Strain-induced grain refinement of cobalt during surface mechanical attrition treatment
文献类型：期刊论文
| 作者 | X. Wu ; N. Tao ; Y. Hong ; G. Liu ; B. Xu ; J. Lu ; K. Lu |
| 刊名 | Acta Materialia
 |
| 出版日期 | 2005 |
| 卷号 | 53期号:3页码:681-691 |
| 关键词 | nanostructure plastic deformation martensitic transformation surface mechanical attrition treatment cobalt nanocrystalline aluminum plastic-deformation ambient-temperature stainless-steel slip modes hcp cobalt metals microstructure nanoscale evolution |
| ISSN号 | 1359-6454 |
| 中文摘要 | 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. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/35135]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | X. Wu,N. Tao,Y. Hong,et al. Strain-induced grain refinement of cobalt during surface mechanical attrition treatment[J]. Acta Materialia,2005,53(3):681-691. |
| APA | X. Wu.,N. Tao.,Y. Hong.,G. Liu.,B. Xu.,...&K. Lu.(2005).Strain-induced grain refinement of cobalt during surface mechanical attrition treatment.Acta Materialia,53(3),681-691. |
| MLA | X. Wu,et al."Strain-induced grain refinement of cobalt during surface mechanical attrition treatment".Acta Materialia 53.3(2005):681-691. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。