| Al20Cu2Mn3相中孪晶的高分辨电子显微术研究 |
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| 引用本文： | 李春志,王顺才,金延. Al20Cu2Mn3相中孪晶的高分辨电子显微术研究[J]. 金属学报, 1992, 28(1): 1-5 |
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| 作者姓名： | 李春志 王顺才 金延 |
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| 作者单位： | 北京航空材料研究所 国科学院金属研究所固体原子像开放实验室 |
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| 摘 要： | 2024铝合金中的弥散相Al_(20)Cu_2Mn_3普遍由孪晶组成,通过高分辨像的观察分析,发现其孪晶间的界面不是镜面,而是滑移面;孪晶两部分不是反映(或旋转)对称,而是滑移反映对称,“金刚石”滑移面是(101),滑移矢量(1/4)(a-c),组成孪晶的各晶体组元呈棱柱体形状,各侧棱都平行于[010],棱柱侧面是{010}和{100}。
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| 关 键 词： | 孪晶 滑移反映 Al－Cu－Mg合金 |
| 收稿时间： | 1992-01-18 |
| 修稿时间： | 1992-01-18 |
HIGH RESOLUTION STUDY OF TWINS IN Al_(20)Cu_2Mn_3 PHASE |
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| LI Chunzhi,WANG Shuncai,JIN Yan Institute of Aeronautical Materials,Beijing,Laboratory of Atomic Imaging of Solids. HIGH RESOLUTION STUDY OF TWINS IN Al_(20)Cu_2Mn_3 PHASE[J]. Acta Metallurgica Sinica, 1992, 28(1): 1-5 |
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| Authors: | LI Chunzhi WANG Shuncai JIN Yan Institute of Aeronautical Materials Beijing Laboratory of Atomic Imaging of Solids |
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| Affiliation: | LI Chunzhi,WANG Shuncai,JIN Yan Institute of Aeronautical Materials,Beijing,Laboratory of Atomic Imaging of Solids,Institute of Metal Research,Academia Sinaica,Shenyang |
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| Abstract: | The dispersoid phase Al_(20)Cu_2Mn_3 in a 2024 Al alloy is commonly composed of twins. An observation of corresponding high resolution image shows that the twin boundary plane is a glide plane other than mirror one. Two neighbouring components of twins are not symmetry of reflection or rotation, but of glide reflection. The "diamond" glide plane is (101) and the glide vector is (1/4)(a--c). Components of twins in the phase take shape of prism with the longitudinal edge being parallel to [010] and side faces being {101} and {100}. |
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| Keywords: | twin glide reflection high resolution image Al-Cu-Mg alloy |
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