Phase Field Modeling of Formation Mechanism of Grain Boundary Allotriomorph in beta ->alpha Phase Transformation in Ti-6Al-4V Alloy

doi:10.11900/0412.1961.2019.00392

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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 Jia 1,2; Li Xuexiong 2; Zhang Jinhu 2; Wang Gang 5; Yang Mei 4; Wang Hao 2,3; Xu Dongsheng 2,3
刊名	ACTA METALLURGICA SINICA
	2020-08-11
卷号	56 期号:8 页码:1113-1122
关键词	Ti-6Al-4V phase field model thermal noise term alpha(GB) grain boundary wetting
ISSN号	0412-1961
DOI	10.11900/0412.1961.2019.00392
通讯作者	Xu Dongsheng(dsxu@imr.ac.cn)
英文摘要	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.
资助项目	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研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000550617100007
资助机构	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
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/139837]
专题	金属研究所_中国科学院金属研究所
通讯作者	Xu Dongsheng
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 4.Jiangsu Univ Technol, Sch Mat Engn, Changzhou 213001, Peoples R China 5.South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510006, Peoples R China
推荐引用方式 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.