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题名: Quantitative Phase Field Simulation of alpha Particle Dissolution in Ti-6Al-4V Alloys Below beta Transus Temperature
作者: Yang, Mei;  Wang, Gang;  Liu, Tao;  Zhao, Wen-Juan;  Xu, Dong-Sheng
发表日期: 2017-8-1
摘要: 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 alpha particles in Ti-6Al-4V alloy below beta 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 alpha particles decay with time as: f = f(eq) + (f(0) - 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 Al and V concentration fields around the particles appear more obvious soft impingement.
刊名: ACTA METALLURGICA SINICA-ENGLISH LETTERS
Appears in Collections:中国科学院金属研究所_期刊论文

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Recommended Citation:
Yang, Mei,Wang, Gang,Liu, Tao,et al. Quantitative Phase Field Simulation Of Alpha Particle Dissolution In Ti-6al-4v Alloys Below Beta Transus Temperature[J]. Acta Metallurgica Sinica-english Letters,2017,30(8):745-752.

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