| 大塑性变形纳米结构Al-Mg合金中的形变缺陷和电子辐照效应 |
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| 引用本文： | 刘满平,孙少纯,Hans J.ROVEN,于瀛大,张桢,Maxim MURASHKIN,Ruslan Z.VALIEV.大塑性变形纳米结构Al-Mg合金中的形变缺陷和电子辐照效应[J].中国有色金属学会会刊,2012,22(8):1810-1816. |
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| 作者姓名： | 刘满平 孙少纯 Hans J.ROVEN 于瀛大 张桢 Maxim MURASHKIN Ruslan Z.VALIEV |
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| 作者单位： | 江苏大学材料科学与工程学院;Department of Materials Science and Engineering,Norwegian University of Science and Technology (NTNU), NO-7491,Trondheim,Norway;Department of Materials Science and Engineering,Norwegian University of Science and Technology (NTNU),NO-7491,Trondheim,Norway;Institute of Physics of Advanced Materials,Ufa State Aviation Technical University,Ufa 450000,Russia |
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| 基金项目： | Project (50971087) supported by the National Natural Science Foundation of China;Project (BK2012715) supported by the Basic Research Program (Natural Science Foundation) of Jiangsu Province, China;Project (10371800) supported by the Research Council of Norway under the NEW Light (NEWLIGHT) Metals of the Strategic Area (SA) Materials;Project (11JDG070) supported by the Senior Talent Research Foundation of Jiangsu University, China |
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| 摘 要： | 为澄清大塑性变形纳米结构Al-Mg合金中形变缺陷形成的本质,采用高分辨透射电子显微镜（HRTEM）研究电子辐照对高压扭转合金中面缺陷形成的影响。结果表明：对已有高密度面缺陷的HRTEM图像,经电子束照射一段时间后,这些面缺陷会完全消失;而在没有缺陷的HRTEM图像区域进行电子辐照,即使电子束的照射提高到足以在该区域击出孔洞,整个过程均未观察到任何晶格缺陷。因此,高压扭转合金中的面缺陷主要来源于极度的塑性变形,而与HRTEM观察过程中的电子辐照效应无关。
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| 关 键 词： | Al-Mg合金 大塑性变形 高压扭转 电子辐照 形变缺陷 透射电子显微镜 |
| 收稿时间： | 10 November 2011 |
Deformation defects and electron irradiation effect in nanostructured Al-Mg alloy processed by severe plastic deformation |
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| Man-ping LIU,Shao-chun SUN,Hans J. ROVEN,Ying-da YU,Zhen ZHANG,Maxim MURASHKIN,Ruslan Z. VALIEV.Deformation defects and electron irradiation effect in nanostructured Al-Mg alloy processed by severe plastic deformation[J].Transactions of Nonferrous Metals Society of China,2012,22(8):1810-1816. |
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| Authors: | Man-ping LIU Shao-chun SUN Hans J ROVEN Ying-da YU Zhen ZHANG Maxim MURASHKIN Ruslan Z VALIEV |
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| Affiliation: | LIU Man-ping1,2, SUN Shao-chun1, Hans J. ROVEN2, YU Ying-da2, ZHANG Zhen1, Maxim MURASHKIN3, Ruslan Z. VALIEV3 1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China; 2. Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU), NO-7491, Trondheim, Norway; 3. Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, Ufa 450000, Russia |
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| Abstract: | In order to explore the exact nature of deformation defects previously observed in nanostructured Al-Mg alloys subjected to severe plastic deformation, a more thorough examination of the radiation effect on the formation of the planar defects in the high pressure torsion (HPT) alloys was conducted using high-resolution transmission electron microscopy (HRTEM). The results show that high density defects in the HRTEM images disappear completely when these images are exposed under the electron beam for some duration of time. At the same time, lattice defects are never observed within no-defect areas even when the beam-exposure increases to the degree that holes appear in the areas. Therefore, it is confirmed that the planar defects observed in the HPT alloys mainly result from the significant plastic deformation and are not due to the radiation effect during HRTEM observation. |
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| Keywords: | Al-Mg alloy severe plastic deformation high pressure torsion electron irradiation deformation defects transmission electron microscopy |
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