| Origin of the omega-Strengthening and Embrittlement in beta-Titanium Alloys: Insight from First Principles | |
| Cao, Sh1; Chen, W.2; Yang, R.1; Hu, Q-M1 | |
| Corresponding Author | Cao, Sh(scao14b@imr.ac.cn) |
| 2021-09-01 | |
| Source Publication | PHYSICAL MESOMECHANICS
 |
| ISSN | 1029-9599 |
| Volume | 24Issue:5Pages:513-522 |
| Abstract | The omega-phase precipitates in beta-Ti alloys increase the strength but significantly degrade the ductility of the alloys. In the present work, the mechanism of omega-strengthening and embrittlement is investigated by using a first principles method based on density functional theory. The generalized stacking fault energies of various slip systems in both the beta and omega phases are calculated. The strengthening and embrittlement effects of the omega phase are discussed by comparing the slip energy barriers of slip systems in the beta and omega phases with different orientation relationships. It is found that the slip energy barriers of slip systems in the omega phase, except for ((2) over bar 020){[0001](omega), are much higher than those of slip systems in the beta phase, which explains the omega-strengthening and embrittlement effects. The slip energy barrier of the most active slip system in the phase, ((2) over bar 020){[0001](omega), increases with the depletion of Mo and increasing extent of structure collapse, suggesting that aging treatment enhances the -strengthening and embrittlement effects. |
| Keyword | titanium alloys phase embrittlement generalized stacking fault energy first-principles calculations |
| Funding Organization | Natural Science Foundation of China ; National Science and Technology Major Project ; China Postdoctoral Science Foundation |
| DOI | 10.1134/S1029959921050027 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Natural Science Foundation of China[91860107] ; Natural Science Foundation of China[52071315] ; Natural Science Foundation of China[52001307] ; National Science and Technology Major Project[J2019-VI0012-0126] ; China Postdoctoral Science Foundation[2019M661149] |
| WOS Research Area | Mechanics ; Materials Science |
| WOS Subject | Mechanics ; Materials Science, Characterization & Testing |
| WOS ID | WOS:000710990100002 |
| Publisher | SPRINGER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/167111 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Cao, Sh |
| Affiliation | 1.Chinese Acad 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 |
| Recommended Citation GB/T 7714 | Cao, Sh,Chen, W.,Yang, R.,et al. Origin of the omega-Strengthening and Embrittlement in beta-Titanium Alloys: Insight from First Principles[J]. PHYSICAL MESOMECHANICS,2021,24(5):513-522. |
| APA | Cao, Sh,Chen, W.,Yang, R.,&Hu, Q-M.(2021).Origin of the omega-Strengthening and Embrittlement in beta-Titanium Alloys: Insight from First Principles.PHYSICAL MESOMECHANICS,24(5),513-522. |
| MLA | Cao, Sh,et al."Origin of the omega-Strengthening and Embrittlement in beta-Titanium Alloys: Insight from First Principles".PHYSICAL MESOMECHANICS 24.5(2021):513-522. |
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