Enhancing microstructural stability and creep properties by Ta addition in Ni-based single crystal superalloys
文献类型：期刊论文
| 作者 | Gao, Yuting1,2; Dong, Jiasheng1; Wang, Li1; Liu, Pengcheng1,2; Zhang, Jiachen3; Lou, Langhong1 |
| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2024-09-01 |
| 卷号 | 909页码:15 |
| 关键词 | Ni-based single crystal superalloy Tantalum Lattice misfit Thermal exposure Creep |
| ISSN号 | 0921-5093 |
| DOI | 10.1016/j.msea.2024.146873 |
| 通讯作者 | Dong, Jiasheng(djs@imr.ac.cn) |
| 英文摘要 | To investigate influences of Ta content on microstructural stability during thermal exposure at 900 degrees C (up to 3000 h) and creep properties at 980 degrees C/163 MPa in Ni-based SX superalloy, alloys with 7Ta, 8Ta and 9Ta (wt.%) were studied utilizing DSC, SEM, TEM, HR-XRD and APT. The results shows that Ta addition enhanced the partitioning behavior of alloying elements. Besides, lattice misfit was controlled by both alloy composition and temperature. Ta addition increased absolute misfit both room temperature and 980 degrees C. The difference was that the gamma/gamma ' lattice misfit changed from positive to negative at room temperature. The gamma ' coarsening indicated that Ta addition reduced the effective diffusion coefficient and exacerbated W segregation at gamma/gamma ' interface, which was beneficial to improve the microstructural stability. Merging of several adjacent gamma ' precipitates in preferred direction was observed to be delayed with increasing Ta content, which occurred at 500 h for 7Ta alloy, 800 h for 8Ta alloy and 1000 h for 9Ta alloy, respectively. Ta addition affected the diffusion kinetics and greatly prolonged the steady creep duration, and then resulted in longer creep rupture life. It was discussed based on the gamma matrix channels, gamma ' raft thickness, the perfection degree of gamma ' rafts, residual gamma ' precipitates, interfacial dislocation networks and solid solution strengthening. |
| 资助项目 | National Science and Technology Major Project[2017 -VI -0019-0091] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001261606300001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Science and Technology Major Project |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Dong, Jiasheng |
| 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, Shenyang 110016, Peoples R China 3.Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, Yuting,Dong, Jiasheng,Wang, Li,et al. Enhancing microstructural stability and creep properties by Ta addition in Ni-based single crystal superalloys[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2024,909:15. |
| APA | Gao, Yuting,Dong, Jiasheng,Wang, Li,Liu, Pengcheng,Zhang, Jiachen,&Lou, Langhong.(2024).Enhancing microstructural stability and creep properties by Ta addition in Ni-based single crystal superalloys.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,909,15. |
| MLA | Gao, Yuting,et al."Enhancing microstructural stability and creep properties by Ta addition in Ni-based single crystal superalloys".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 909(2024):15. |
入库方式： OAI收割
来源：金属研究所
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