| 液氮温度下动态塑性形变法制备的纳米孪晶铜结构的研究 |
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| 引用本文： | 卢秋虹,赵伟松,隋曼龄,李斗星.液氮温度下动态塑性形变法制备的纳米孪晶铜结构的研究[J].金属学报,2006,42(9):909-913. |
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| 作者姓名： | 卢秋虹 赵伟松 隋曼龄 李斗星 |
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| 作者单位： | 1. 中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳,110016;沈阳建筑大学理学院,沈阳,110168
2. 中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳,110016 |
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| 基金项目： | 国家自然科学基金;国家重点基础研究发展计划(973计划) |
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| 摘 要： | 利用透射电子显微镜，对液氮温度下动态塑性形变法（LNT—DPD）制备的块体纳米孪晶铜在不同形变量下的微观结构演变进行了研究．结果表明，经LNT—DPD处理后，Cu呈现复杂的微观结构特征：由高密度的纳米尺寸形变孪晶片层团簇、纳米晶组织和含有较高密度位错结构的粗晶组织交错分布组成；其形成机制可归因于形变孪晶与剪切带共同作用的结果．揭示了经LNT—DPD处理的Cu的超高拉伸强度与其微观结构的关系．
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| 关 键 词： | 纳米孪晶 剪切带 动态塑性形变法 |
| 文章编号： | 0412-1961（2006）09-0909-05 |
| 收稿时间： | 2006-04-12 |
| 修稿时间： | 2006-04-12 |
MICROSTRUCTURES OF NANO-TWIN STRUCTURED Cu PRODUCED BY DYNAMIC PLASTIC DEFORMATION AT LIQUID NITROGEN TEMPERATURE |
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| LU Qiuhong,ZHAO Weisong,SUI Manling,LI Douxing.MICROSTRUCTURES OF NANO-TWIN STRUCTURED Cu PRODUCED BY DYNAMIC PLASTIC DEFORMATION AT LIQUID NITROGEN TEMPERATURE[J].Acta Metallurgica Sinica,2006,42(9):909-913. |
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| Authors: | LU Qiuhong ZHAO Weisong SUI Manling LI Douxing |
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| Affiliation: | 1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016;2. School of Science, Shenyang Jianzhu University, Shenyang 110168 |
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| Abstract: | Microstructural feature and evolution of nano-twin bulk Cu specimens produced by means of dynamic plastic deformation at liquid nitrogen temperature (LNT-DPD) have been studied using TEM.The results show that the microstructure of LNT-DPD Cu consists of high density of nano-scaled mechanical twins,nano-sized grains and coarse grains with high density of dislocations, which makes the LNT-DPD Cu exhibit a significant high tensile yield strength.Such a deformation structure was attributed to twinning and shearing during the LNT-DPD treatment. |
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| Keywords: | Cu |
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