| New insights into formation mechanism of interfacial twin boundary omega-phase in metastable beta-Ti alloys | |
| Chen, Wei1; Cao, Shuo2,3; Zhang, Jinyu1; Zha, You1; Hu, Qingmiao2,3; Sun, Jun1 | |
| Corresponding Author | Zhang, Jinyu(jinyuzhang1002@mail.xjtu.edu.cn) ; Hu, Qingmiao(qmhu@imr.ac.cn) |
| 2020-06-01 | |
| Source Publication | MATERIALS CHARACTERIZATION
 |
| ISSN | 1044-5803 |
| Volume | 164Pages:7 |
| Abstract | 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. |
| Keyword | beta-Titanium alloys omega-Precipitates Phase transformation Reorientation TEM characterization First-principles calculation |
| Funding Organization | 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 |
| DOI | 10.1016/j.matchar.2020.110363 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing |
| WOS ID | WOS:000539355400035 |
| Publisher | ELSEVIER SCIENCE INC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/139223 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Zhang, Jinyu; Hu, Qingmiao |
| Affiliation | 1.Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China 2.Chinese Acad Sci, Shengyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| Recommended Citation 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. |
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