| Simulation of the precipitation process of Ni75AixV25-x alloys incorporated in the microelasticity field |
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| 作者姓名： | Yongsheng Li Zheng Chen Yungang Li Yanli Lu Yongxin Wang |
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| 作者单位： | [1]Materials Science and Engineering School, Northwestern Polytechnical University, Xi＇an 710072, China [2]State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi＇an 710072, China |
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| 基金项目： | This study was financially supported by the National Natural Science Foundation of China （No.50671084）, the National High-Tech Research and Development Program of China （No.2002AA331050）, and the Doctorate Foundation of Northwestern Polytechnical University （No. CX200507）. |
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| 摘 要： | The microelasticity field was incorporated into the microscopic phase-field equation for the ternary alloy systems, the morphology evolution and coarsening behavior of the Ni75AixV25-x alloy were simulated. The γ phase precipitates initially for Ni75Al7aV17.9 and Ni75Al5.5V19.5 alloys and the two phases transform from the equiaxed or strip-like to the quadrate as the growth and coarsening processes. For the anisotropic elasticity interaction of the system, the orientation of γ is along the 〈001〉 directions and the θ phase is along the short axis direction of 10]. Analysis of the structure and the pair-correlation functions indicate that the average precipitate length scale of the particles increases at the late-stage coarsening, and the dynamical scaling behavior is obeyed.
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| 关 键 词： | Ni75AixV25-x合金 三元合金 沉淀过程 微弹性场 结构函数 模拟 晶粒粗化 |
| 收稿时间： | 2006-01-08 |
Simulation of the precipitation process of Ni75AixV25-x alloys incorporated in the microelasticity field |
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| Yongsheng Li Zheng Chen Yungang Li Yanli Lu Yongxin Wang.Simulation of the precipitation process of Ni75AixV25-x alloys incorporated in the microelasticity field[J].Journal of University of Science and Technology Beijing,2007,14(1):61-66. |
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| Authors: | Yongsheng Li Zheng Chen Yungang Li Yanli Lu Yongxin Wang |
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| Affiliation: | 1. Materials Science and Engineering School, Northwestern Polytechnical University, Xi''an 710072, China;2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi''an 710072, China;1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;2. College of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China;3. School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China |
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| Abstract: | The microelasticity field was incorporated into the microscopic phase-field equation for the ternary alloy systems, the morphology evolution and coarsening behavior of the Ni75AlxV25-x alloy were simulated. The γ phase precipitates initially for Ni75Al7.1V17.9 and Ni75Al5.5V19.5 alloys and the two phases transform from the equiaxed or strip-like to the quadrate as the growth and coarsening processes. For the anisotropic elasticity interaction of the system, the orientation of γ is along the <001> directions and the θ phase is along the short axis direction of 10]. Analysis of the structure and the pair-correlation functions indicate that the average precipitate length scale of the particles increases at the late-stage coarsening, and the dynamical scaling behavior is obeyed. |
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| Keywords: | Ni75AixV25-x microelasticity field precipitation coarsening structure function |
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