Effect of internal nitridation on microstructure and mechanical properties of cobalt-based superalloy under high-temperature nitrogen atmosphere
文献类型：期刊论文
| 作者 | Chen, Yipeng1,2; Cai, Yong2; Yuan, Chao1; Kong, Weiwen2; Wang, Yongqiang1,2; Wen, Xin1,2; Liu, Xin1 |
| 刊名 | MATERIALS CHARACTERIZATION
 |
| 出版日期 | 2023-06-01 |
| 卷号 | 200页码:14 |
| 关键词 | Cobalt-based superalloy Internal nitridation Nitridation kinetics analysis Microstructure evolution |
| ISSN号 | 1044-5803 |
| DOI | 10.1016/j.matchar.2023.112851 |
| 通讯作者 | Yuan, Chao(ychao@imr.ac.cn) |
| 英文摘要 | In this study, the microstructure and mechanical properties of cobalt-based superalloys by internal nitridation at 1100 degrees C, 1150 degrees C, and 1200 degrees C were characterised in detail by transmission electron microscope (TEM), electron probe microanalysis (EPMA), electron backscatter diffraction (EBSD) and microhardness testing. The results show that with an increase in the internal nitridation temperature, the nitridation layer thickness of cobalt-based superalloys gradually increases to 898 & mu;m. Internal nitridation at 1200 degrees C for 10 h exhibits the densest nitrides and the thickest layer. The precipitates were then dispersed in the matrix. The precipitates are mainly cubic, spherical, and cruciform (Ti, Nb)(C, N). Small amounts of blocky AlN and Cr2N were observed in the outer nitridation layer. Internal nitridation significantly improves the mechanical properties of cobalt-based superalloys by precipitation and solution strengthening. The yield strength increased by 105 % at room temperature (RT). Compared with the yield strength of 100 MPa for the as-received alloy at 800 degrees C, the internal nitridation alloy could still maintain good mechanical properties: a yield strength 300 MPa and an elongation 32%. In addition, because of the low diffusion activation energy of nitrogen in cobalt-based superalloys, internal nitridation is suitable for strengthening cobalt-based superalloys, expanding their application prospects in engineering structural materials. |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001058270700001 |
| 出版者 | ELSEVIER SCIENCE INC |
| 源URL | [http://ir.imr.ac.cn/handle/321006/179011]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Yuan, Chao |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 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 | Chen, Yipeng,Cai, Yong,Yuan, Chao,et al. Effect of internal nitridation on microstructure and mechanical properties of cobalt-based superalloy under high-temperature nitrogen atmosphere[J]. MATERIALS CHARACTERIZATION,2023,200:14. |
| APA | Chen, Yipeng.,Cai, Yong.,Yuan, Chao.,Kong, Weiwen.,Wang, Yongqiang.,...&Liu, Xin.(2023).Effect of internal nitridation on microstructure and mechanical properties of cobalt-based superalloy under high-temperature nitrogen atmosphere.MATERIALS CHARACTERIZATION,200,14. |
| MLA | Chen, Yipeng,et al."Effect of internal nitridation on microstructure and mechanical properties of cobalt-based superalloy under high-temperature nitrogen atmosphere".MATERIALS CHARACTERIZATION 200(2023):14. |
入库方式： OAI收割
来源：金属研究所
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