Avoiding microstructural instabilities in high tungsten containing superalloys by adjusting Al content
文献类型：期刊论文
| 作者 | Fei, Xiang1,2; Sheng, Naicheng1; Sun, Shijie1; Fan, Shigang1; Xie, Jun1; Yu, Jinjiang1; Hou, Guichen1; Li, Jinguo1; Zhou, Yizhou1; Sun, Xiaofeng1 |
| 刊名 | MATERIALS CHARACTERIZATION
 |
| 出版日期 | 2024-06-01 |
| 卷号 | 212页码:11 |
| 关键词 | Superalloys Tungsten Thermo-Calc Microstructures Mechanical properties |
| ISSN号 | 1044-5803 |
| DOI | 10.1016/j.matchar.2024.113966 |
| 通讯作者 | Sheng, Naicheng(ncsheng@imr.ac.cn) ; Sun, Xiaofeng(xfsun@imr.ac.cn) |
| 英文摘要 | The effects of Al contents on the microstructures and mechanical properties of superalloy with high tungsten content were studied. During solidification, Al was found to be enriched in the residual liquid, which led to the transformation of eutectic morphology from reticular to bulk-like. When the Al content increased to 8 wt%, beta-NiAl phase formed in the inter-dendritic region, Thermo-Calc calculations confirms such the experimental phenomenon. The absolute value of the lattice misfit between the gamma/gamma' phases and the elastic strain energy increases, then the size of the gamma' phase increases when the Al concentration rises from 7 wt% to 8 wt%. When the Al content increased to 7 wt%, the tungsten-rich alpha-W phase is precipitated and the volume fraction is 1.20%. The volume fraction of the alpha-W phase increases to 7.84% when the Al content reached 8 wt%, which is consistent with the Thermo-Calc calculation results. After the room temperature tensile and stress rupture life test at 975 degrees C / 235 MPa, it revealed that the precipitation of hard and brittle alpha-W and beta-NiAl phases with high Al content, which resulted in the mechanical properties decreased due to the crack initiation at multiple locations and then interconnected. The higher density of gamma' phase with 6 wt% Al makes it difficult for dislocations to bypass. The site of crack initiation is decreased due to the absense of brittle phase. The stress rupture life can reach 49.21 h of the alloy. |
| 资助项目 | National Key Research and Development Program of China[2022YFB3705000] ; National Postdoctoral Program for Innovative Talents[BX2021322] ; National Natural Science Foundation of China[52104352] ; Liaoning Provincial Natural Science Foundation Project[2023 -BS -015] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001242354700001 |
| 出版者 | ELSEVIER SCIENCE INC |
| 资助机构 | National Key Research and Development Program of China ; National Postdoctoral Program for Innovative Talents ; National Natural Science Foundation of China ; Liaoning Provincial Natural Science Foundation Project |
| 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, Superalloys Div, 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. Avoiding microstructural instabilities in high tungsten containing superalloys by adjusting Al content[J]. MATERIALS CHARACTERIZATION,2024,212:11. |
| APA | Fei, Xiang.,Sheng, Naicheng.,Sun, Shijie.,Fan, Shigang.,Xie, Jun.,...&Sun, Xiaofeng.(2024).Avoiding microstructural instabilities in high tungsten containing superalloys by adjusting Al content.MATERIALS CHARACTERIZATION,212,11. |
| MLA | Fei, Xiang,et al."Avoiding microstructural instabilities in high tungsten containing superalloys by adjusting Al content".MATERIALS CHARACTERIZATION 212(2024):11. |
入库方式： OAI收割
来源：金属研究所
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