Effect of hafnium content on the microstructural evolution and stress rupture properties of K4750 nickel-based superalloy
文献类型：期刊论文
| 作者 | Ou, Meiqiong; Ma, Yingche; Hou, Kunlei; Liu, Kui |
| 刊名 | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| 出版日期 | 2022-09-25 |
| 卷号 | 916页码:12 |
| ISSN号 | 0925-8388 |
| 关键词 | Nickel-based superalloy Hf addition MC carbide M-23 C-6 carbide ?? phase Stress rupture properties |
| DOI | 10.1016/j.jallcom.2022.165473 |
| 通讯作者 | Ma, Yingche(ycma@imr.ac.cn) |
| 英文摘要 | The microstructural evolution of K4750 nickel-based superalloy with different hafnium (Hf) contents was investigated by thermodynamic calculations (TC) and experiments. According to TC, with the increases of Hf content from 0 wt% to 1.5 wt%, the redissolving temperature of MC carbide first decreased rapidly and then tended to be relatively stable, the precipitated temperature of M23C6 carbide decreased gradually, while the gamma ' weight fraction increased first and then stabilized. Three alloys containing 0 wt%, 0.11 wt%, and 0.28 wt% Hf were then prepared to further study the evolution of the microstructure. The experimental results showed that the increase of Hf content changed the morphology of MC carbide from long strip to rodlike and blocky, which is caused by the decrease of Ti and Nb contents and the increase of Hf content in MC carbides. The addition of Hf also changed the morphology of M23C6 carbide from continuous to granular due to the different MC distribution at grain boundaries (GBs). In addition, a small amount of Hf segregated into the gamma ' phase, reducing the Al and Nb contents of the gamma ' phase, resulting in an increased gamma/gamma ' lattice mismatch. As the Hf content increased from 0 wt% to 0.11 wt% and 0.28 wt%, the mean stress rupture life at 750 degrees C and 430 MPa increased from 99.54 h to 105.73 h and 170.96 h, which was closely related to the evolution of MC, M23C6 and gamma ' precipitates. Therefore, the relationship between microstructure and stress rupture properties was discussed in detail. |
| 资助项目 | National Natural Science Foundation of China[52001314] ; Natural Science Foundation of Liaoning Province of China[2020-BS-0 08] |
| WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE SA |
| WOS记录号 | WOS:000806925600003 |
| 资助机构 | National Natural Science Foundation of China ; Natural Science Foundation of Liaoning Province of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/174245]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Ma, Yingche |
| 作者单位 | Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ou, Meiqiong,Ma, Yingche,Hou, Kunlei,et al. Effect of hafnium content on the microstructural evolution and stress rupture properties of K4750 nickel-based superalloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2022,916:12. |
| APA | Ou, Meiqiong,Ma, Yingche,Hou, Kunlei,&Liu, Kui.(2022).Effect of hafnium content on the microstructural evolution and stress rupture properties of K4750 nickel-based superalloy.JOURNAL OF ALLOYS AND COMPOUNDS,916,12. |
| MLA | Ou, Meiqiong,et al."Effect of hafnium content on the microstructural evolution and stress rupture properties of K4750 nickel-based superalloy".JOURNAL OF ALLOYS AND COMPOUNDS 916(2022):12. |
入库方式： OAI收割
来源：金属研究所
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