Abnormal improvement of high-temperature stress rupture life in a new low cost Ni-based single crystal superalloy by adding minor nitrogen
文献类型：期刊论文
| 作者 | Tao, Xipeng2; Wang, Xinguang1,2; Meng, Jie2; Zhou, Yizhou1,2; Li, Jinguo2; Sun, Xiaofeng2 |
| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2023-05-08 |
| 卷号 | 872页码:13 |
| 关键词 | Nitrogen content High temperature Microstructure Stress rupture property Single crystal superalloy |
| ISSN号 | 0921-5093 |
| DOI | 10.1016/j.msea.2023.144980 |
| 通讯作者 | Wang, Xinguang(xgwang11b@imr.ac.cn) ; Zhou, Yizhou(yzzhou@imr.ac.cn) |
| 英文摘要 | Generally, elevated nitrogen (N) content promotes the precipitation of nitrides, which increase the size and quantity of porosity and thus degrade the mechanical performance of superalloys. However, in this study, N content was found to have a beneficial impact on the stress rupture property of single-crystal (SX) superalloys. The results indicated that as the N content increased from 5 ppm to 35 ppm, the porosity first decreased and then increased. The porosity of the sample with 14 ppm N was the lowest, 0.072% +/- 0.011%, which was mainly attributed to the TiN phases in interdendritic pools that compensated for volume shrinkage by lattice expansion. The addition of N reduced the volume fraction and antiphase boundary energy of the gamma ' phase because TiN nitride formation consumed Ti in large quantities. Additionally, the rupture life at 1100 degrees C/130 MPa was abnormally improved to 251.67 h +/- 19 h as the N content was increased to 14 ppm, while it was markedly decreased as the N content was continuously increased to 35 ppm. The improved stress fracture life of the alloy was primarily attributed to the formation of TiN with a small size, which retarded microporosity formation and effectively impeded dislocation movement in gamma channels. Moreover, during the stress rupture test, the size of the tertiary gamma ' phase first reduced to a minimum in the alloy containing 14 ppm N, which increased the resistance to dislocation movement. However, excessive addition of N drastically reduced the stress fracture life as the precipitation and solid solution strengthening in the gamma ' phase weakened. In addition, the agglomeration of nitride inclusions formed defects that aggravated crack nucleation and propagation. The overall N impact was studied, and the optimal N content was ascertained to provide further instructions for the commercial development of Re-free secondgeneration SX alloys. |
| 资助项目 | National Key R&D Program of China[2017YFA0700704] ; National Science and Technology Major Project ; Innovation Academy for Light-duty Gas Turbine, Chinese Academy of Sciences[2017-VI-0002-0072] ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; [CXYJJ20-MS-03] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001004065500001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Key R&D Program of China ; National Science and Technology Major Project ; Innovation Academy for Light-duty Gas Turbine, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences |
| 源URL | [http://ir.imr.ac.cn/handle/321006/178240]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Wang, Xinguang; Zhou, Yizhou |
| 作者单位 | 1.72 Wenhua Rd, Shenyang 110016, Peoples R China 2.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 | Tao, Xipeng,Wang, Xinguang,Meng, Jie,et al. Abnormal improvement of high-temperature stress rupture life in a new low cost Ni-based single crystal superalloy by adding minor nitrogen[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2023,872:13. |
| APA | Tao, Xipeng,Wang, Xinguang,Meng, Jie,Zhou, Yizhou,Li, Jinguo,&Sun, Xiaofeng.(2023).Abnormal improvement of high-temperature stress rupture life in a new low cost Ni-based single crystal superalloy by adding minor nitrogen.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,872,13. |
| MLA | Tao, Xipeng,et al."Abnormal improvement of high-temperature stress rupture life in a new low cost Ni-based single crystal superalloy by adding minor nitrogen".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 872(2023):13. |
入库方式： OAI收割
来源：金属研究所
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