| Properties of beta/omega phase interfaces in Ti and their implications on mechanical properties and omega morphology | |
| Cao, Shuo1,2; Jiang, Yong3,4; Yang, Rui2; Hu, Qing-Miao2 | |
| Corresponding Author | Hu, Qing-Miao(qmhu@imr.ac.cn) |
| 2019-02-15 | |
| Source Publication | COMPUTATIONAL MATERIALS SCIENCE
 |
| ISSN | 0927-0256 |
| Volume | 158Pages:49-57 |
| Abstract | omega phase precipitating in a beta-Ti alloy is generally detrimental to the ductility and plasticity of the alloy.To understand the influence of omega phase on the mechanical properties of beta-Ti alloys, the property of the beta/omega interface is demanded.In this regard, we calculate the interface energies (gamma(int)), cleavage energies (gamma(cl)), and generalized stacking fault energies (gamma) of the beta/omega interfaces with different orientations using a first-principles method.Our calculations predict interface energies of 0.32 J m(-2) and 0.03 J m(-2) for the (1 1 (1) over bar)(beta)/(0 0 0 1)(omega) and (1 1 2)(beta)/(1 0 (1) over bar 0)(omega) interfaces, respectively.The strong anisotropy of the interface energy contributes to the ellip-soid-like morphology of omega phase with its major axis parallel to the < 1 1 1 >(beta) direction.The influence of the interface on the ductility of the alloy is discussed with the calculated cleavage energies and the unstable stacking fault energies (gamma(us)) extracted from the generalized stacking fault energy (GSFE). The gamma(cl)/gamma(us) ratio of the (1 1 2)(beta)/(1 0 10)(omega) interface is lower than those of the main slip planes of the bulk phases, indicating that this interface is prone to crack initiation and propagation as compared to the bulk and contributes to theca-embrittlement of beta-Ti alloys. |
| Keyword | Titanium alloys Generalized stacking fault energy Interface energy First-principles calculations |
| Funding Organization | National Key Basic Research Program ; National Key Research and Development Program of China |
| DOI | 10.1016/j.commatsci.2018.10.042 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Basic Research Program[2014CB644001] ; National Key Research and Development Program of China[2016YFB0701301] |
| WOS Research Area | Materials Science |
| WOS Subject | Materials Science, Multidisciplinary |
| WOS ID | WOS:000456022400007 |
| Publisher | ELSEVIER SCIENCE BV |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/131304 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Hu, Qing-Miao |
| Affiliation | 1.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 3.Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China 4.Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China |
| Recommended Citation GB/T 7714 | Cao, Shuo,Jiang, Yong,Yang, Rui,et al. Properties of beta/omega phase interfaces in Ti and their implications on mechanical properties and omega morphology[J]. COMPUTATIONAL MATERIALS SCIENCE,2019,158:49-57. |
| APA | Cao, Shuo,Jiang, Yong,Yang, Rui,&Hu, Qing-Miao.(2019).Properties of beta/omega phase interfaces in Ti and their implications on mechanical properties and omega morphology.COMPUTATIONAL MATERIALS SCIENCE,158,49-57. |
| MLA | Cao, Shuo,et al."Properties of beta/omega phase interfaces in Ti and their implications on mechanical properties and omega morphology".COMPUTATIONAL MATERIALS SCIENCE 158(2019):49-57. |
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