Influence of Substituting W for Nb or Hf on Solidification Behavior of a Typical Co-Ni-Al-W Based Superalloy
文献类型：期刊论文
| 作者 | Zhang, Huifang1,2; Xie, Jun1; Li, Qi1; Wu, Hao1; Yu, Jinjiang1; Chai, Hongyu1; Zhang, Fengjiang1; Li, Jinguo1; Zhou, Yizhou1; Sun, Xiaofeng1 |
| 刊名 | ACTA METALLURGICA SINICA-ENGLISH LETTERS
 |
| 出版日期 | 2024-07-22 |
| 页码 | 14 |
| 关键词 | Co-Ni-Al-W-based superalloys Solidification microstructure Segregation Solidification path |
| ISSN号 | 1006-7191 |
| DOI | 10.1007/s40195-024-01749-2 |
| 通讯作者 | Xie, Jun(junxie@imr.ac.cn) ; Li, Qi(qli17b@imr.ac.cn) |
| 英文摘要 | Understanding the effects of various elements on solidification behavior is crucial for designing the composition of gamma'-strengthened Co-based superalloys and is fundamental for controlling the as-cast structure and formulating subsequent heat treatment processes. This research investigated the effects of replacing 1 at.% W with 1 at.% Nb or Hf elements on the solidification behavior of Co-Ni-Al-W-based superalloys. The findings revealed that substituting W with Nb and Hf resulted in a notable decrease in both the solidus temperature (TS) and liquidus temperature (TL). Specifically, the substitution of W with Nb lowered TS from 1353 degrees C to 1332 degrees C and TL from 1383 degrees C to 1368 degrees C, while replacing W with Hf decreased TS from 1353 degrees C to 1330 degrees C and TL from 1383 degrees C to 1366 degrees C. Moreover, both Nb and Hf element are positive segregation element, while Nb decreases and Hf increases W segregation, respectively. During the final solidification stage, the substitution of W with Nb resulted in the formation of eutectic (gamma + gamma'), Co3Ta, and a small amount of mu-Co7Nb6 phase, while replacing W with Hf resulted in the formation of the Laves phase and beta-CoAl phase. The solidification paths of the three alloys were confirmed based on the result of differential scanning calorimetry, isothermal solidification experiment and Thermo-calc simulation. These results offer a theoretical basis for the composition design and optimization of heat treatment processes for Co-Ni-Al-W-based superalloys. |
| 资助项目 | National Key Research and Development Program of China[2023YFB3712003] ; National Science and Technology Major Project[J2019-VI-0018-0133] ; AECC Independent Innovation Special Fund Project[ZZCX-2022-040] ; National Natural Science Foundation of China[51701212] ; National Natural Science Foundation of China[51771191] ; National Natural Science Foundation of China[51971214] ; Youth Innovation Promotion Association Project, Chinese Academy of Sciences[2020198] |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001274308600002 |
| 出版者 | CHINESE ACAD SCIENCES, INST METAL RESEARCH |
| 资助机构 | National Key Research and Development Program of China ; National Science and Technology Major Project ; AECC Independent Innovation Special Fund Project ; National Natural Science Foundation of China ; Youth Innovation Promotion Association Project, Chinese Academy of Sciences |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Xie, Jun; Li, Qi |
| 作者单位 | 1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Huifang,Xie, Jun,Li, Qi,et al. Influence of Substituting W for Nb or Hf on Solidification Behavior of a Typical Co-Ni-Al-W Based Superalloy[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2024:14. |
| APA | Zhang, Huifang.,Xie, Jun.,Li, Qi.,Wu, Hao.,Yu, Jinjiang.,...&Sun, Xiaofeng.(2024).Influence of Substituting W for Nb or Hf on Solidification Behavior of a Typical Co-Ni-Al-W Based Superalloy.ACTA METALLURGICA SINICA-ENGLISH LETTERS,14. |
| MLA | Zhang, Huifang,et al."Influence of Substituting W for Nb or Hf on Solidification Behavior of a Typical Co-Ni-Al-W Based Superalloy".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2024):14. |
入库方式： OAI收割
来源：金属研究所
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