Influence of processing temperature on microstructure and microhardness of copper subjected to high-pressure torsion
文献类型：期刊论文
| 作者 | Xie ZL(谢子令) ; Xie JJ(谢季佳); Hong YS(洪友士); Wu XL(武晓雷); Xie ZL
|
| 刊名 | Science China-Technological Sciences
 |
| 出版日期 | 2010 |
| 卷号 | 53期号:6页码:1534-1539 |
| 通讯作者邮箱 | xiezl@wzu.edu.cn |
| ISSN号 | 1674-7321 |
| 通讯作者 | Xie ZL |
| 中文摘要 | Cu samples were subjected to high-pressure torsion (HPT) with up to 6 turns at room temperature (RT) and liquid nitrogen temperature (LNT), respectively. The effects of temperature on grain refinement and microhardness variation were investigated. For the samples after HPT processing at RT, the grain size reduced from 43 mu m to 265 nm, and the Vickers microhardness increased from HV52 to HV140. However, for the samples after HPT processing at LNT, the value of microhardness reached its maximum of HV150 near the center of the sample and it decreased to HV80 at the periphery region. Microstructure observations revealed that HPT straining at LNT induced lamellar structures with thickness less than 100 nm appearing near the central region of the sample, but further deformation induced an inhomogeneous distribution of grain sizes, with submicrometer-sized grains embedded inside micrometer-sized grains. The submicrometer-sized grains with high dislocation density indicated their nonequilibrium nature. On the contrary, the micrometer-sized grains were nearly free of dislocation, without obvious deformation trace remaining in them. These images demonstrated that the appearance of micrometer-sized grains is the result of abnormal grain growth of the deformed fine grains. |
| 类目[WOS] | Engineering, Multidisciplinary ; Materials Science, Multidisciplinary |
| 研究领域[WOS] | Engineering ; Materials Science |
| 关键词[WOS] | NANOCRYSTALLINE ; DEFORMATION ; CU ; EVOLUTION ; METALS ; ALLOY |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [10721202, 10772178, 50571110] |
| 原文出处 | http://www.springerlink.com/content/v00583j564ht2611/ |
| 语种 | 英语 |
| WOS记录号 | WOS:000278839200014 |
| 公开日期 | 2011-03-01 ; 2011-03-30 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/43497]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 通讯作者 | Xie ZL |
| 推荐引用方式 GB/T 7714 | Xie ZL,Xie JJ,Hong YS,et al. Influence of processing temperature on microstructure and microhardness of copper subjected to high-pressure torsion[J]. Science China-Technological Sciences,2010,53(6):1534-1539. |
| APA | 谢子令,谢季佳,洪友士,武晓雷,&Xie ZL.(2010).Influence of processing temperature on microstructure and microhardness of copper subjected to high-pressure torsion.Science China-Technological Sciences,53(6),1534-1539. |
| MLA | 谢子令,et al."Influence of processing temperature on microstructure and microhardness of copper subjected to high-pressure torsion".Science China-Technological Sciences 53.6(2010):1534-1539. |
入库方式： OAI收割
来源：力学研究所
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