| 映像力对高纯铝自由表面附近位错组态的影响 |
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| 引用本文： | 李东,毛卫民,余永宁.映像力对高纯铝自由表面附近位错组态的影响[J].北京科技大学学报,2007,29(11):1105-1108. |
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| 作者姓名： | 李东 毛卫民 余永宁 |
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| 作者单位： | 北京科技大学材料科学与工程学院,北京,100083 |
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| 基金项目： | 国家自然科学基金
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教育部高等学校博士学科点专项科研基金 |
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| 摘 要： | 采用分析位错映像力的方法研究了纯铝表层区域直螺、直刃位错所承受的滑移应力,理论上计算出映像应力作用下直螺、刃位错临界滑移距离和纯铝表层低位错密度区尺寸.讨论了直刃位错临界攀移距离和温度的关系,指出了表面上相对稳定的位错组态.
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| 关 键 词： | 纯铝 位错 映像力 临界滑移距离 临界攀移距离 像力 高纯铝 自由表面 位错组态 影响 aluminium high purity free surface configuration dislocation image force 稳定 关系 温度 滑移距离 尺寸 位错密度 临界 应力作用 映像 |
| 收稿时间： | 2006-08-09 |
| 修稿时间： | 2006-11-14 |
Influence of image force on dislocation configuration near free surface of high purity aluminium |
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| LI Dong,MAO Weimin,YU Yongning.Influence of image force on dislocation configuration near free surface of high purity aluminium[J].Journal of University of Science and Technology Beijing,2007,29(11):1105-1108. |
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| Authors: | LI Dong MAO Weimin YU Yongning |
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| Abstract: | The slip stress acting on straight screw and edge dislocations in surface layer of pure aluminum was investigated based on the analysis of dislocation image force. The size of low dislocations' density area of the surface layer and the critical slip distance of the dislocations induced by image stress effects were calculated theoretically. The relationship between critical climb distance and temperature of straight edge dislocation was discussed. The relatively stable dislocation configuration around the surface layer was indicated. |
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| Keywords: | pure aluminum dislocation image force critical slip distance critical climb distance |
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