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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 AuthorXu Dongsheng(dsxu@imr.ac.cn)
2020-08-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume56Issue:8Pages:1113-1122
AbstractThe 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.
KeywordTi-6Al-4V phase field model thermal noise term alpha(GB) grain boundary wetting
Funding OrganizationNational 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
DOI10.11900/0412.1961.2019.00392
Indexed BySCI
Language英语
Funding ProjectNational 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 AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000550617100007
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/139838
Collection中国科学院金属研究所
Corresponding AuthorXu Dongsheng
Affiliation1.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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