| Step Structure in Cold-Rolled Deformed Nanocrystalline Nickel |
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| 作者姓名： | 张喜燕 武晓雷 夏宝玉 周明哲 周世杰 贾冲 |
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| 作者单位： | [1]School of Physical Science and Engineering Technology, Guangxi University, Nanning 530004 [2]School of Material Science and Engineering, Southwest Jiaotong University, Chengdu 610031 [3]State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 50471086 and 50461001. |
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| 摘 要： | The microstructure characteristic of the cold-rolled deformed nanocrystalline nickel metal is studied by transmission electron microscopy. The results show that there are step structures nearby the grain boundary （CB）, and the contrast of stress field in front of the step corresponds to the step in the shape. It is indicated that the interaction between twins and dislocations is not a necessary condition to realizing the deformation. In the later stage of the deformation when the grain size becomes about lOOnm, the deformation can depend upon the moving of the boundary of the stack faults （SFs） which result from the partial dislocations emitted from CBs. However, when the size of SFs grows up, the local internal stress which is in front of the step gradually becomes higher. When this stress reaches a critical value which stops the gliding of the partial dislocations, the SFs will stop to grow up and leave a step structure behind.
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| 关 键 词： | 金箔 镍币 显微结构 断层 厚度 |
| 收稿时间： | 2005-02-17 |
| 修稿时间： | 2005-02-17 |
Step Structure in Cold-Rolled Deformed Nanocrystalline Nickel |
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| Zhang XiYan;Wu XiaoLei;Xia BaoYu;Zhou MingZhe;Zhou ShiJie;Gu Chong.Step Structure in Cold-Rolled Deformed Nanocrystalline Nickel[J].Chinese Physics Letters,2005,22(9):2335-2337. |
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| Authors: | Zhang XiYan;Wu XiaoLei;Xia BaoYu;Zhou MingZhe;Zhou ShiJie;Gu Chong |
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