Multi-scale Study of the Formation and Evolution of M6C Carbides in High-Tungsten Superalloys
文献类型：期刊论文
| 作者 | Fei, Xiang1,2; Sheng, Naicheng1; Sun, Shijie1; Fan, Shigang1; Yu, Jinjiang1; Hou, Guichen1; Li, Jinguo1; Zhou, Yizhou1; Sun, Xiaofeng1 |
| 刊名 | ACTA METALLURGICA SINICA-ENGLISH LETTERS
 |
| 出版日期 | 2024-08-22 |
| 页码 | 13 |
| 关键词 | Superalloys Tungsten Solution treatment Carbides Mechanical properties |
| ISSN号 | 1006-7191 |
| DOI | 10.1007/s40195-024-01754-5 |
| 通讯作者 | Sheng, Naicheng(ncsheng@imr.ac.cn) ; Sun, Xiaofeng(xfsun@imr.ac.cn) |
| 英文摘要 | The formation and evolution of M6C carbides in high-W superalloy following solution treatment was investigated at different temperatures. Initially, during solid solution treatment, MC and M6C carbides was precipitated in the alloy. As the temperature increased, the morphology of M6C carbides transitioned from granular to needle-like. During the solution treatment at 1255 degrees C, the MC carbides degraded and transformed into M6C carbides, forming a symbiotic relationship between them. Nonetheless, no clear orientation relationship was observed between the two types of carbides. After further increasing the temperature to 1270 degrees C, the precipitation of needle-like M6C carbides in the dendrite arm was confirmed. This was supported by electron probe X-ray micro-analyzer and selected area electron diffraction patterns. Subsequently, a detailed examination of the three-dimensional morphology and orientation relationship of the needle-like phase with the matrix was carried out using focused-ion-beam and transmission electron microscopy techniques. The results indicated that the flat interface of the needle phase exhibited a specific orientation relationship with the matrix. However, in the three-dimensional plane, the interfaces between the needle-like phase and the matrix were not straight. Furthermore, no clear orientation relationship between the non-straight interfaces and the matrix was observed. As the solution temperature increased, the tensile properties at room temperature progressively decreased, while the stress rupture properties peaked at 1260 degrees C, suggesting that the alloy demonstrated its optimal comprehensive performance at this temperature. A subsequent analysis was conducted on the longitudinal section of the fracture using electron backscattered diffraction. The results showed a noticeable concentration of stress at the interface between MC and M6C carbides, which ultimately led to crack initiation at this interface. In addition, as the solid solution temperature increased, the quantity of symbiotic phases also increased. This phenomenon led to the initiation of cracks at multiple locations, which then propagated and interconnected. As a consequence, the tensile properties and stress rupture life of the alloy progressively deteriorated. |
| 资助项目 | National Key Research and Development Program of China[2022YFB3705000] ; National Natural Science Foundation of China[52303394] ; Liaoning Provincial Natural Science Foundation[2023-BS-015] |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001296523300004 |
| 出版者 | CHINESE ACAD SCIENCES, INST METAL RESEARCH |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Liaoning Provincial Natural Science Foundation |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Sheng, Naicheng; Sun, Xiaofeng |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, 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 | Fei, Xiang,Sheng, Naicheng,Sun, Shijie,et al. Multi-scale Study of the Formation and Evolution of M6C Carbides in High-Tungsten Superalloys[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2024:13. |
| APA | Fei, Xiang.,Sheng, Naicheng.,Sun, Shijie.,Fan, Shigang.,Yu, Jinjiang.,...&Sun, Xiaofeng.(2024).Multi-scale Study of the Formation and Evolution of M6C Carbides in High-Tungsten Superalloys.ACTA METALLURGICA SINICA-ENGLISH LETTERS,13. |
| MLA | Fei, Xiang,et al."Multi-scale Study of the Formation and Evolution of M6C Carbides in High-Tungsten Superalloys".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2024):13. |
入库方式： OAI收割
来源：金属研究所
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