| 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 | |
| 通讯作者 | Tian, Ning(syhgxytn@163.com) ; Li, Deyuan(dmy1962@sina.com) |
| 发表期刊 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 2022-01-13 | |
| 卷号 | 831页码:12 |
| ISSN | 0921-5093 |
| 摘要 | 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. |
| 关键词 | TiAl-Nb alloy Microstructure Deformation mechanism Damage features |
| DOI | 10.1016/j.msea.2021.142094 |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000703531400001 |
| 关键词[WOS] | DEFORMATION-BEHAVIOR |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS类目 | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 资助项目 | 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] |
| 项目资助者 | 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 |
| 论文分区 | 一类 |
| 力学所作者排名 | 3+ |
| RpAuthor | Tian, Ning ; Li, Deyuan |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/87484 |
| 专题 | 非线性力学国家重点实验室 |
| 作者单位 | 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 |
| 推荐引用方式 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. |
| 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 | 浏览 下载 | |
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