| Microstructure evolution and fracture mechanism of a TiAl-Nb alloy during high-temperature tensile testing | |
| Zhang, Shunke1,2; Tian, Ning1,2; Li, Deyuan2; Li JH(李江华)3; Jin, Fangwei1; Wang, Guangyan1; Tian, Sugui1,2 | |
| Corresponding Author | Tian, Ning([email protected]) ; Li, Deyuan([email protected]) |
| Source Publication | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 2022-01-13 | |
| Volume | 831Pages:12 |
| ISSN | 0921-5093 |
| Abstract | A TiAl-Nb alloy was prepared by casting, and its tensile properties and microstructure evolution at different temperatures were investigated. The results show that the brittle-ductile transition temperature (BDTT) of the alloy is 880-920 degrees C. At low temperatures, deformation mainly occurs in the gamma lamellae and coarsening gamma phase between the lamellar colonies. As the temperature increase in the transitory stage, a small number of dislocations may pass through the interface from the coarsening gamma phase into the gamma lamellae. During the brittle stage, the dislocation and dislocation array bow out from the phase interface, and twins are emitted from the phase interface, which may contribute to the accommodation of stress concentration. During the ductile stage, the gamma lamellae coarsen due to the thinner and smaller alpha 2 lamellae dissolving and phase boundary transfer. The dislocations interact with the dislocation walls to form subboundaries in the gamma lamellae and transform into equiaxed crystals by dynamic recrystallization (DRX), which increases the plasticity of the alloy. With the transition from the brittle model to the ductile model, the fracture mode of the alloy changes from the mixed fracture mode of transgranular fracture and translaminar fracture to intergranular fracture. |
| Keyword | TiAl-Nb alloy Microstructure Deformation mechanism Damage features |
| DOI | 10.1016/j.msea.2021.142094 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000703531400001 |
| WOS Keyword | DEFORMATION-BEHAVIOR |
| WOS Research Area | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| Funding Project | Young Science and Technology Talent Development Project of the Education Department of Guizhou Province[KY [2019] 163] ; Science and Technology Foundation Project of Guizhou Province[qiankehejichu [2020] 1Y198] ; Science and Technology Foundation Project of Guizhou Province[qiankehejichu[2019] 2870] ; Science and Technology Project of Bijie City[bikehezi [2019] 2] ; Science and Technology Project of Bijie City[bikehezi [2017] 05] ; Characteristic Key Laboratory of University of Guizhou Province[qianjiaoheKYzi [2019] 053] ; Coal & Phosphorus Chemical En-gineering Technology Center of Bijie City[[2015] 1] |
| Funding Organization | Young Science and Technology Talent Development Project of the Education Department of Guizhou Province ; Science and Technology Foundation Project of Guizhou Province ; Science and Technology Project of Bijie City ; Characteristic Key Laboratory of University of Guizhou Province ; Coal & Phosphorus Chemical En-gineering Technology Center of Bijie City |
| Classification | 一类 |
| Ranking | 3+ |
| Contributor | Tian, Ning ; Li, Deyuan |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/87484 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Guizhou Univ Engn Sci, Bijie 551700, Peoples R China; 2.Shenyang Univ Technol, Shenyang 110870, Peoples R China; 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang, Shunke,Tian, Ning,Li, Deyuan,et al. Microstructure evolution and fracture mechanism of a TiAl-Nb alloy during high-temperature tensile testing[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,831:12.Rp_Au:Tian, Ning, Li, Deyuan |
| APA | Zhang, Shunke.,Tian, Ning.,Li, Deyuan.,李江华.,Jin, Fangwei.,...&Tian, Sugui.(2022).Microstructure evolution and fracture mechanism of a TiAl-Nb alloy during high-temperature tensile testing.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,831,12. |
| MLA | Zhang, Shunke,et al."Microstructure evolution and fracture mechanism of a TiAl-Nb alloy during high-temperature tensile testing".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 831(2022):12. |
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| Jp2021F389.pdf（18584KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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