Dislocation-mediated migration of the &alpha;/&beta; interfaces in titanium

doi:10.1016/j.actamat.2023.119364

IMR OpenIR

	Dislocation-mediated migration of the α/β interfaces in titanium
	Zhang, Jin-Yu 1,2; Sun, Zhi-Peng 3; Qiu, Dong 4; Dai, Fu-Zhi 5; Zhang, Yang-Sheng 1,6; Xu, Dongsheng 7; Zhang, Wen-Zheng 1,8
通讯作者	Xu, Dongsheng(dsxu@imr.ac.cn) ; Zhang, Wen-Zheng(zhangwz@tsinghua.edu.cn)
	2023-12-01
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	261 页码:12
摘要	Interphase boundaries are essential in the deformation and phase transformations in titanium (Ti) alloys. While static structures of semicoherent alpha/beta interfaces in various Ti alloys have been carefully examined, their migration behavior at atomic scales is far less clear. In this study, we employed molecular dynamics simulations to investigate the migration of the semicoherent alpha/beta interface in pure Ti. The interface migration behavior shows a shear-coupled feature with the interface dislocation glide and a macroscopic shear. The simulation reveals that both the glide direction of the dislocations with respect to the interface and the dislocation spacing strongly influence the migration rate, and the low-index glide plane of the interface dislocation plays a minor role. The dependence of interface mobility on temperatures confirms the critical role of thermal activation during the interface migration, especially for activating the interface dislocation glide. Furthermore, the shear-coupled interface migration driven by element partition is simulated using a newly developed Ti-Mo potential, consistent with the displacive-diffusional features previously observed in the surface precipitates. The simulated interface migration mode is validated by comparing it with the crystallography features of surface precipitates in a Ti-Cr alloy. The interface energy and mobility obtained from simulations further explain why the distinctive crystallographic features of the surface precipitates observed experimentally are favored over other candidate interfaces. The present study has explored an approach for systematically examining thermodynamic and kinetic factors governing the development of phase transformation crystallography at different temperatures and chemical driving forces.
关键词	Interface migration Molecular dynamics Titanium Dislocation glide Surface precipitate
资助者	National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Science and Technology ; Informatization Plan of Chinese Academy of Sciences
DOI	10.1016/j.actamat.2023.119364
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51871131] ; National Key Research and Development Program of China[2016YFB0701304] ; National Key Research and Development Program of China[2021YFB3702604] ; National Science and Technology[J2019 -VI-0005-0119] ; Informatization Plan of Chinese Academy of Sciences[CAS-WX2021PY-0103]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001088746800001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/177859
专题	中国科学院金属研究所
通讯作者	Xu, Dongsheng; Zhang, Wen-Zheng
作者单位	1.Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat MOE, Beijing 100084, Peoples R China 2.Univ Claude Bernard Lyon 1, Inst Lumiere Matiere, CNRS, F-69622 Villeurbanne, France 3.Nucl Power Inst China, Sci & Technol Reactor Syst Design Technol Lab, Chengdu 610041, Peoples R China 4.RMIT Univ, Ctr Addit Mfg, Sch Engn, Melbourne, VIC 3000, Australia 5.Artificial Intelligence Sci Inst, Beijing 100084, Peoples R China 6.Beijing Inst Radio Measurement, Beijing 100854, Peoples R China 7.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 8.Fujian Univ Technol, Sch Mat Sci & Technol, Fuzhou 350118, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jin-Yu,Sun, Zhi-Peng,Qiu, Dong,et al. Dislocation-mediated migration of the α/β interfaces in titanium[J]. ACTA MATERIALIA,2023,261:12.
APA	Zhang, Jin-Yu.,Sun, Zhi-Peng.,Qiu, Dong.,Dai, Fu-Zhi.,Zhang, Yang-Sheng.,...&Zhang, Wen-Zheng.(2023).Dislocation-mediated migration of the α/β interfaces in titanium.ACTA MATERIALIA,261,12.
MLA	Zhang, Jin-Yu,et al."Dislocation-mediated migration of the α/β interfaces in titanium".ACTA MATERIALIA 261(2023):12.