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| Microstructure and hardness of Cu-12% Fe composite at different drawing strains简 | |
| 作者姓名： | Xiao-pei LU Da-wei YAO Yi CHEN Li-tian WANG An-ping DONG Liang MENG Jia-bin LIU |
| 基金项目： | Project supported by the National Natural Science Foundation of China （Nos. 11202183 and 50671092）, the National Science ＆ Tech- nology Pillar Program during the Eleventh Five-Year Plan Period （No. 2009BAG12A09）, the National High Technology Research and Development Program （863） of China （No. 2011AAllA101）, and the Zhejiang Provincial Natural Science Foundation of China （No. Y4100193） |
| 摘 要： | Cu-12% Fe （in weight） composite was prepared by casting, pretreating, and cold drawing. The microstructure was observed and Vickers hardness was measured for the composite at various drawing strains. Cu and Fe grains could evolve into aligned filaments during the drawing process. X-ray diffraction （XRD） was used to analyze the orientation evolution during the drawing process. The axial direction of the filamentary structure has different preferred orientations from the radial directions. The strain of Fe grains linearly increases with an increase in the drawing strain up to 6.0, and deviates from the linear relation when the drawing strain is higher than 6.0. With an increase in the drawing strain, the microstructure scales of Fe filaments exponentially decrease. The density of the interface between Cu and Fe phases exponentially increases with an increase in the aspect ratio of Fe filaments. There is a similar Hall-Perch relationship between the hardness and Fe filament spacing. The refined microstructure from drawing deformation at drawing strains lower than 3.0 can induce a more significant hardening effect than that at drawing strains higher than 3.0. |
| 关 键 词： | Cu-12% Fe alloys Drawing Microstructure Hardness |
Microstructure and hardness of Cu-12% Fe composite at different drawing strains |
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| Xiao-pei LU,Da-wei YAO,Yi CHEN,Li-tian WANG,An-ping DONG,Liang MENG,Jia-bin LIU.Microstructure and hardness of Cu-12% Fe composite at different drawing strains[J].Journal of Zhejiang University Science,2014,15(2):149-156. | |
| Authors: | Xiao-pei Lu Da-wei Yao Yi Chen Li-tian Wang An-ping Dong Liang Meng Jia-bin Liu |
| Institution: | 1. Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China 2. China Railway Construction Electrification Bureau Group Co., Ltd., Beijing, 100036, China 3. College of Electrical Engineering, Zhejiang University, Hangzhou, 310027, China |
| Abstract: | Cu-12% Fe (in weight) composite was prepared by casting, pretreating, and cold drawing. The microstructure was observed and Vickers hardness was measured for the composite at various drawing strains. Cu and Fe grains could evolve into aligned filaments during the drawing process. X-ray diffraction (XRD) was used to analyze the orientation evolution during the drawing process. The axial direction of the filamentary structure has different preferred orientations from the radial directions. The strain of Fe grains linearly increases with an increase in the drawing strain up to 6.0, and deviates from the linear relation when the drawing strain is higher than 6.0. With an increase in the drawing strain, the microstructure scales of Fe filaments exponentially decrease. The density of the interface between Cu and Fe phases exponentially increases with an increase in the aspect ratio of Fe filaments. There is a similar Hall-Petch relationship between the hardness and Fe filament spacing. The refined microstructure from drawing deformation at drawing strains lower than 3.0 can induce a more significant hardening effect than that at drawing strains higher than 3.0. |
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