Effects of cooling rate on borides morphology and structure in cast β-solidifying γ-TiAl alloy
文献类型：期刊论文
| 作者 | Liu, Renci1,2; Wang, Xi1,2; Cao, Ruxin1,2; Zhou, Yangtao1,2; Cui, Yuyou1,2; Yang, Rui1,2 |
| 刊名 | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| 出版日期 | 2024-02-05 |
| 卷号 | 973页码:9 |
| 关键词 | gamma-TiAl Boride Microstructure Cast Cooling rate |
| ISSN号 | 0925-8388 |
| DOI | 10.1016/j.jallcom.2023.172872 |
| 通讯作者 | Liu, Renci(rcliu@imr.ac.cn) |
| 英文摘要 | Borides have been found to play a significant role in determining the mechanical properties of cast TiAl alloys. In order to investigate the influence of cooling rate on the morphology and structure of borides, SEM and HRTEM techniques were utilized to analyze borides in Ti-43Al-4 Nb-1Mo-0.5B (at%) cast plates with varying thicknesses. A higher cooling rate was observed to result in the formation of elongated, curvy borides with high aspect ratios, increased planar faults, and complex structures consisting of a combination of B2 phase and various boride phases. Conversely, a slower cooling rate yielded shorter bar-shaped borides with fewer planar faults. This variation in boride morphology can be attributed to the differing thicknesses of the solute-rich layer, where the eutectic reaction occurs, at the solidification front during fast and slow cooling processes. The B-f-TiB with a habit plane of (010) was identified as the dominant phase at all cooling rates. Borides in the [100] and [001] directions demonstrated a faster growth rate compared to those in the [010] direction. Additionally, HRTEM results indicated the presence of TiB2 while Ti3B4 was absent. This can be explained by the limited phase region of Ti3B4 in both the binary Ti-B and ternary Ti-Al-B phase diagrams, which is the smallest among all phases. These findings enhance the understanding of how cooling rate influences the morphology and structure of borides in TiAl alloys, thus providing insights for optimizing alloy design and manufacturing processes. |
| 资助项目 | CAS Project for Young Scientists in Basic Research[YSBR-025] ; Major Special Science and Technology Project of Yunnan Province[202302AB080009] ; National Major science and Technology Projects of China[J2019-VII-0002-0142] |
| WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001126710700001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | CAS Project for Young Scientists in Basic Research ; Major Special Science and Technology Project of Yunnan Province ; National Major science and Technology Projects of China |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Liu, Renci |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Renci,Wang, Xi,Cao, Ruxin,et al. Effects of cooling rate on borides morphology and structure in cast β-solidifying γ-TiAl alloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2024,973:9. |
| APA | Liu, Renci,Wang, Xi,Cao, Ruxin,Zhou, Yangtao,Cui, Yuyou,&Yang, Rui.(2024).Effects of cooling rate on borides morphology and structure in cast β-solidifying γ-TiAl alloy.JOURNAL OF ALLOYS AND COMPOUNDS,973,9. |
| MLA | Liu, Renci,et al."Effects of cooling rate on borides morphology and structure in cast β-solidifying γ-TiAl alloy".JOURNAL OF ALLOYS AND COMPOUNDS 973(2024):9. |
入库方式： OAI收割
来源：金属研究所
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