New insights into formation mechanism of interfacial twin boundary omega-phase in metastable beta-Ti alloys

doi:10.1016/j.matchar.2020.110363

CORC > 金属研究所 > 中国科学院金属研究所

	New insights into formation mechanism of interfacial twin boundary omega-phase in metastable beta-Ti alloys
	Chen, Wei 2; Cao, Shuo 1,3; Zhang, Jinyu 2; Zha, You 2; Hu, Qingmiao 1,3; Sun, Jun 2
刊名	MATERIALS CHARACTERIZATION
	2020-06-01
卷号	164 页码:7
关键词	beta-Titanium alloys omega-Precipitates Phase transformation Reorientation TEM characterization First-principles calculation
ISSN号	1044-5803
DOI	10.1016/j.matchar.2020.110363
通讯作者	Zhang, Jinyu(jinyuzhang1002@mail.xjtu.edu.cn) ; Hu, Qingmiao(qmhu@imr.ac.cn)
英文摘要	The omega-phase transformation in metastable beta-titanium (Ti) alloys has attracted great attention in the past decade due to its intrinsic complexity and modifying mechanical properties. Interfacial twin boundary (ITB) omega-phase was reported to appear along {332}(beta) or {112}(beta) twin boundaries in metastable beta-Ti alloys. The formation of such ITB omega-phase was proposed to arise from the reverse alpha '' to beta martensitic transformation and subsequent stress relaxation along the twin boundaries. In this study, a new formation mechanism is revealed in Ti-10wt.%Cr alloy containing co-precipitates in the initial microstructure. It is experimentally found that the formation of ITB cophase is closely correlated with the favored pre-existing one co-variant at the expense of the other three-siblings, i.e., reorientation of omega-variants. The co-reorientation mechanism is further rationalized by first-principles calculation in terms of the energy barrier of transformation pathway between omega-variants. These findings advance our fundamental understanding to the omega-phase transformation and further plastic deformation behavior of Ti alloys.
资助项目	National Natural Science Foundation of China[51871176] ; National Natural Science Foundation of China[51722104] ; National Natural Science Foundation of China[51621063] ; National Natural Science Foundation of China[91860107] ; National Key Research and Development Program of China[2017YFA0700701] ; National Key Research and Development Program of China[2017YFB0702301] ; National Key Research and Development Program of China[2016YFB0701301] ; 111 Project 2.0 of China[PB2018008] ; Natural Science Basic Research Plan in Shaanxi Province of China[2018JM5098] ; International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies ; Fok Ying Tong Education Foundation[161096] ; Shaanxi Province Innovative Talents Promotion Projects[2018KJXX-004]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000539355400035
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program of China ; 111 Project 2.0 of China ; Natural Science Basic Research Plan in Shaanxi Province of China ; International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies ; Fok Ying Tong Education Foundation ; Shaanxi Province Innovative Talents Promotion Projects
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/139220]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, Jinyu; Hu, Qingmiao
作者单位	1.Chinese Acad Sci, Shengyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Chen, Wei,Cao, Shuo,Zhang, Jinyu,et al. New insights into formation mechanism of interfacial twin boundary omega-phase in metastable beta-Ti alloys[J]. MATERIALS CHARACTERIZATION,2020,164:7.
APA	Chen, Wei,Cao, Shuo,Zhang, Jinyu,Zha, You,Hu, Qingmiao,&Sun, Jun.(2020).New insights into formation mechanism of interfacial twin boundary omega-phase in metastable beta-Ti alloys.MATERIALS CHARACTERIZATION,164,7.
MLA	Chen, Wei,et al."New insights into formation mechanism of interfacial twin boundary omega-phase in metastable beta-Ti alloys".MATERIALS CHARACTERIZATION 164(2020):7.