| Microstructure and tensile properties of ultrafine grained copper processed by equal-channel angular pressing |
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| 作者姓名： | WEI Wei CHEN Guang WANG Jingtao and CHEN Guoliang |
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| 作者单位： | WEI Wei1，2)，CHEN Guang2)，WANG Jingtao2)，and CHEN Guoliang2) 1) Department of Materials Science and Engineering，Jiangsu Polytechnic University，Changzhou 213016，China 2) Department of Materials Science and Engineering，Nanjing University of Science and Technology，Nanjing 210094，China |
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| 摘 要： | 1. Introduction There has been an interest in the research of spe- cific microstructure and unique mechanical proper- ties in ultrafine-grained (UFG) materials 1]. Equal-channel angular pressing (ECAP) process has been successfully applied to obtain UFG structure in numerous metals and alloys 2-6]. However, there are some deficiencies on copper deformed to large shear strains. Ferrasse et al. 6] argued that intense simple shear promotes dynamic rotation recrystalli- zation during ECAP…
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| 关 键 词： | 微结构 张力性 平衡信道 高强度 金属学 |
| 收稿时间： | 2005-10-07 |
Microstructure and tensile properties of ultrafine grained copper processed by equal-channel angular pressing |
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| WEI Wei,,CHEN Guang,WANG Jingtao,and CHEN Guoliang .Microstructure and tensile properties of ultrafine grained copper processed by equal-channel angular pressing[J].Rare Metals,2006,25(6):697-703. |
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| Authors: | WEI Wei CHEN Guang WANG Jingtao CHEN Guoliang |
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| Affiliation: | 1. Department of Materials Science and Engineering, Jiangsu Polytechnic University, Changzhou 213016, China;Department of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China
2. Department of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China |
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| Abstract: | Equal-channel angular pressing (ECAP) process was applied to a 12 mm × 12 mm × 80 mm billet of pure copper (99.98 wt.%) at room temperature. The shear deformation characteristics, microstructure evolution, and tensile properties were investigated. A combination of high strength ( 420 MPa) and high elongation to failure (25%) was achieved after eight ECAP passes at room temperature. The mixing of ultrafine grains (0.2 μm) with nanocrystalline grains (80 nm) resulted in high tensile strength and ductility. |
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| Keywords: | equal-channel angular pressing copper microstructure tensile properties ultrafine grain size |
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