Effect of Hf on microstructure and creep properties of a hot corrosion resistant nickel-based single crystal superalloy
文献类型：期刊论文
| 作者 | Ma, Li1,2; Wang, Dong2; Zhang, Gong2; Shen, Jian2; Zhang, Jian2 |
| 刊名 | CHINA FOUNDRY
 |
| 出版日期 | 2025-03-11 |
| 页码 | 9 |
| 关键词 | Ni-based single crystal superalloys hafnium creep properties MC carbides hot corrosion resistance |
| ISSN号 | 1672-6421 |
| DOI | 10.1007/s41230-025-4120-3 |
| 通讯作者 | Wang, Dong(dwang@imr.ac.cn) ; Zhang, Jian(jianzhang@imr.ac.cn) |
| 英文摘要 | To investigate the microstructure and creep properties of a hot corrosion resistant Ni-based single crystal superalloy containing different hafnium (Hf) additions (0-0.4wt.%), creep test was performed at 980 degrees C/200 MPa. Optical microscopy, scanning electron microscopy, electron probe micro analysis (EPMA), and transmission electron microscopy were employed to analyze the microstructure differences. With the increase of Hf, the creep rupture life of the alloys at 980 degrees C/200 MPa gradually increases. Microstructure analysis reveals that Hf promotes the transformation of carbide morphology from script to rod-like and finally to blocky. Upon the addition of Hf, there is an increase in the volume fraction of blocky MC carbides, along with an elevation in the partitioning ratio of Cr and Mo elements. Concurrently, the gamma/gamma ' interfacial dislocation spacing undergoes a reduction. It is found that script carbides are more likely to cause stress concentration in high temperature creep, leading to nucleation and propagation of microcracks. The formation mechanism of blocky MC carbides is related to the increase in precipitation temperature and lattice constant, and its beneficial impact on creep resistance is also investigated based on the analysis of the creep test results. |
| 资助项目 | National Key Research and Development Program of China[2021YFA1600603] ; National Science and Technology Major Project[J20191-VI-0010-0124] ; National Natural Science Foundation of China[52071219] |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001441630100001 |
| 出版者 | SPRINGER SINGAPORE PTE LTD |
| 资助机构 | National Key Research and Development Program of China ; National Science and Technology Major Project ; National Natural Science Foundation 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 | Wang, Dong; Zhang, Jian |
| 作者单位 | 1.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110089, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Li,Wang, Dong,Zhang, Gong,et al. Effect of Hf on microstructure and creep properties of a hot corrosion resistant nickel-based single crystal superalloy[J]. CHINA FOUNDRY,2025:9. |
| APA | Ma, Li,Wang, Dong,Zhang, Gong,Shen, Jian,&Zhang, Jian.(2025).Effect of Hf on microstructure and creep properties of a hot corrosion resistant nickel-based single crystal superalloy.CHINA FOUNDRY,9. |
| MLA | Ma, Li,et al."Effect of Hf on microstructure and creep properties of a hot corrosion resistant nickel-based single crystal superalloy".CHINA FOUNDRY (2025):9. |
入库方式： OAI收割
来源：金属研究所
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