Quantitative Phase Field Simulation of α Particle Dissolution in Ti-6A1-4V Alloys Below β Transus Temperature
查看参考文献34篇
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文摘
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A quantitative phase field method of multi-component diffusion-controlled phase transformations coupled with the Kim-Kim-Suzuki model was applied to study the effect of initial particle size distribution (PSD) in 3D and space distribution in 2D on dissolution of α particles in Ti-6Al-4V alloy below β transus temperature in real time and length scale. The thermodynamic and mobility data were obtained from Thermo-Calc and DICTRA softwares, respectively. The results show that the volume fractions of α particles decay with time as: f = f_(eq)+ (f_o -f_(eq)) exp(-Kt~n) for four cases of PSD. The sequence of dissolution kinetics from fast to slow is: uniform PSD, normal PSD, lognormal PSD and bimodal PSD. The space distribution is found to be a major factor affecting the dissolution kinetics and the microstructures. When the distance of the particles is less than critical value, the dissolution rates reduce with the decrease in distance. The A1 and V concentration fields around the particles appear more obvious soft impingement. |
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来源
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Acta Metallurgica Sinica(English Letters)
,2017,30(8):745-752 【核心库】
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DOI
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10.1007/s40195-017-0562-y
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关键词
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Dissolution
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Phase field model
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Ti-6A1-4V
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Initial PSD
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Space distribution
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地址
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1.
School of Materials and Engineering, Jiangsu University of Technology, Changzhou, 213001
2.
Department of Material Science and Engineering, South China University of Technology, Guangzhou, 510640
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School of Mechanical Engineering, Xiangtan University, Xiangtan, 411105
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Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1006-7191 |
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学科
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金属学与金属工艺 |
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基金
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support from the National Natural Science Foundation of China
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the National Key R&D Program of China
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the Informalization Construction Program of Chinese Academy of Science
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Shenyang Supercomputer Centers for the computational resource of Chinese Academy of Science
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文献收藏号
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CSCD:6031319
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