Microstructural stability and creep properties of middle Nb ?-TiAl alloy with a modulated microstructure
文献类型：期刊论文
| 作者 | Liu, Yan1; Tang, Bin1,2; Huang, Xiaoyu2; Zhu, Lei1; Liu, Dong3; Yang, Rui3; Li, Jinshan1,2 |
| 刊名 | INTERMETALLICS
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 151页码:9 |
| ISSN号 | 0966-9795 |
| 关键词 | TiAl alloys Creep property O phase TEM Microstructure stability |
| DOI | 10.1016/j.intermet.2022.107733 |
| 通讯作者 | Tang, Bin(toby@nwpu.edu.cn) ; Huang, Xiaoyu(stewarthxy@hotmail.com) |
| 英文摘要 | In this work, a modulated structure composed of nano-scale Ti2AlNb (O phase) and alpha 2 phase was obtained in middle Nb gamma-TiAl alloy. The O phase nucleates at the alpha 2/gamma interface and is orthogonal to the alpha 2/gamma interface. The creep testing results show that the modulated structure exhibited the better creep performance compared with the fully lamellar microstructure, manifesting in a smaller minimum creep rate and creep strain after creep for 200 h. The O phase in alpha 2 lamellae suppressed the alpha 2 ->gamma phase transformation and constructed the coherent interface with adjacent gamma lamellae, which replaced part of the semi coherent alpha 2/gamma interface, to reduce the generation of interfacial dislocation loops, thereby improving the creep resistance. Besides, discontinuous precipitations (DPs) caused by (alpha 2/gamma) -> beta 0(omega 0) + gamma phase transformation were observed in the crept samples, contributing to the microstructure degradation. The present work shows significant engineering significance and scientific value for improving the creep performance and microstructure stability for middle Nb-TiAl alloys. |
| 资助项目 | National Key Research and Devel- opment Program of China ; National Natural Science Foundation of China ; (Research Fund of the State Key Laboratory of Solidification Processing, NPU) , China ; [2021YFB3702603] ; [52174377] ; [2022 -TS -06] |
| WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:000867284000002 |
| 资助机构 | National Key Research and Devel- opment Program of China ; National Natural Science Foundation of China ; (Research Fund of the State Key Laboratory of Solidification Processing, NPU) , China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/176311]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Tang, Bin; Huang, Xiaoyu |
| 作者单位 | 1.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China 2.Northwestern Polytech Univ, Chongqing Innovat Ctr, Chongqing 401135, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Yan,Tang, Bin,Huang, Xiaoyu,et al. Microstructural stability and creep properties of middle Nb ?-TiAl alloy with a modulated microstructure[J]. INTERMETALLICS,2022,151:9. |
| APA | Liu, Yan.,Tang, Bin.,Huang, Xiaoyu.,Zhu, Lei.,Liu, Dong.,...&Li, Jinshan.(2022).Microstructural stability and creep properties of middle Nb ?-TiAl alloy with a modulated microstructure.INTERMETALLICS,151,9. |
| MLA | Liu, Yan,et al."Microstructural stability and creep properties of middle Nb ?-TiAl alloy with a modulated microstructure".INTERMETALLICS 151(2022):9. |
入库方式： OAI收割
来源：金属研究所
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