| Phase Field Modeling of Formation Mechanism of Grain Boundary Allotriomorph in beta ->alpha Phase Transformation in Ti-6Al-4V Alloy | |
| Sun Jia1,2; Li Xuexiong1; Zhang Jinhu1; Wang Gang3; Yang Mei4; Wang Hao1,5; Xu Dongsheng1,5 | |
| Corresponding Author | Xu Dongsheng(dsxu@imr.ac.cn) |
| 2020-08-11 | |
| Source Publication | ACTA METALLURGICA SINICA
 |
| ISSN | 0412-1961 |
| Volume | 56Issue:8Pages:1113-1122 |
| Abstract | The microstructure evolution with grain boundary wetting phase transformation of alpha allotriomorph during the beta ->alpha phase transformation in Ti-6Al-4V alloy has been investigated by means of phase field modeling. A realistic microstructure was generated by coupling the Thermo-Calc thermodynamic parameters and phase field evolution equations. It is shown that the specially constructed thermal noise terms disturb the beta/beta interfaces and can produce heterogeneous nucleation of alpha phase at energetically favorable points such as triple junctions and beta grain boundaries (GBs). A small amount of alpha(GB) (grain boundary alpha) nuclei formed at the early stage of phase transition would lead to the formation of discontinuous alpha(GB); while a large number of alpha(GB) nuclei can result in the formation of continuous alpha(GB). GBs can be "wetted" by a second solid phase through the reversible transition from incomplete to complete solid state wetting at a certain temperature without a new reaction. The volume fraction of alpha phase and the grain number increased gradually as the noise amplitude increased from 0.05 to 0.11, or noise duration from 50 s to 80 s. Both noise amplitude and time could control the formation kinetics of alpha(GB), which will influence the microstructure, and the fatigue properties of Ti alloys can be altered if these are controlled experimentally. |
| Keyword | Ti-6Al-4V phase field model thermal noise term alpha(GB) grain boundary wetting |
| Funding Organization | National Key Research and Development Program of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Special Informatization Project of Chinese Academy of Sciences ; National Natural Science Foundation of China |
| DOI | 10.11900/0412.1961.2019.00392 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2016YFB0701304] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDC01040100] ; Special Informatization Project of Chinese Academy of Sciences ; National Natural Science Foundation of China[51671195] |
| WOS Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000550617100007 |
| Publisher | SCIENCE PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/139838 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Xu Dongsheng |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510006, Peoples R China 4.Jiangsu Univ Technol, Sch Mat Engn, Changzhou 213001, Peoples R China 5.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Sun Jia,Li Xuexiong,Zhang Jinhu,et al. Phase Field Modeling of Formation Mechanism of Grain Boundary Allotriomorph in beta ->alpha Phase Transformation in Ti-6Al-4V Alloy[J]. ACTA METALLURGICA SINICA,2020,56(8):1113-1122. |
| APA | Sun Jia.,Li Xuexiong.,Zhang Jinhu.,Wang Gang.,Yang Mei.,...&Xu Dongsheng.(2020).Phase Field Modeling of Formation Mechanism of Grain Boundary Allotriomorph in beta ->alpha Phase Transformation in Ti-6Al-4V Alloy.ACTA METALLURGICA SINICA,56(8),1113-1122. |
| MLA | Sun Jia,et al."Phase Field Modeling of Formation Mechanism of Grain Boundary Allotriomorph in beta ->alpha Phase Transformation in Ti-6Al-4V Alloy".ACTA METALLURGICA SINICA 56.8(2020):1113-1122. |
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