Improve the ductility of a nickel based superalloy by optimizing secondary phase distribution through grain boundary engineering
文献类型：期刊论文
| 作者 | Mao, Qiang2; Zhang, Mengchao2; Zhi, Yaqian2; Wang, Changshuai1; Li, Hui2 |
| 刊名 | MATERIALS CHARACTERIZATION
 |
| 出版日期 | 2021-11-01 |
| 卷号 | 181页码:10 |
| 关键词 | eta phase Carbide Grain boundary character Grain boundary engineering Nickel based superalloy |
| ISSN号 | 1044-5803 |
| DOI | 10.1016/j.matchar.2021.111510 |
| 通讯作者 | Li, Hui(huili@shu.edu.cn) |
| 英文摘要 | The microstructure and high temperature tensile property of grain boundary engineering (GBE) treated GH984 alloy was studied by electron backscattering diffraction, scanning electron microscopy and transmission electron microscopy. After GBE treatment, the fraction of low Sigma coincidence site lattice (CSL) grain boundary increases from 43.1% to 76.9%. The grain boundary network and grain boundary precipitation distribution were optimized by GBE treatment. During aging at 800 degrees C for 160, 320 and 640 h, the needle-like ri phase and M23C6 carbide precipitated at grain boundaries, both have coherent orientation relationship with matrix. The morphology and distribution of precipitates at grain boundaries with various characters are different. The eta phase is parallel distributed along coherent Sigma 3 grain boundary, perpendicularly precipitated at both side of incoherent Sigma 3 grain boundary, while only precipitated at one side of Sigma 9, Sigma 27 and random grain boundaries. Few fine carbide particles precipitated at Sigma 3 grain boundary, the larger carbide precipitated at Sigma 9, Sigma 27 and random grain boundaries. The high temperature ductility of GBE sample is improved compared with that of solution annealed sample under the same aging treatment. According to the experimental results, the effects of grain boundary characters on the precipitation behaviors of eta phase and carbide, and their influences on the mechanical properties were discussed. |
| 资助项目 | National Key Research and Development Program of China[2016YFB0700401] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000706135100001 |
| 出版者 | ELSEVIER SCIENCE INC |
| 资助机构 | National Key Research and Development Program of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/166569]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Li, Hui |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Shanghai Univ, Sch Mat Sci & Engn, Key Lab Microstruct, Shanghai 200444, Peoples R China |
| 推荐引用方式 GB/T 7714 | Mao, Qiang,Zhang, Mengchao,Zhi, Yaqian,et al. Improve the ductility of a nickel based superalloy by optimizing secondary phase distribution through grain boundary engineering[J]. MATERIALS CHARACTERIZATION,2021,181:10. |
| APA | Mao, Qiang,Zhang, Mengchao,Zhi, Yaqian,Wang, Changshuai,&Li, Hui.(2021).Improve the ductility of a nickel based superalloy by optimizing secondary phase distribution through grain boundary engineering.MATERIALS CHARACTERIZATION,181,10. |
| MLA | Mao, Qiang,et al."Improve the ductility of a nickel based superalloy by optimizing secondary phase distribution through grain boundary engineering".MATERIALS CHARACTERIZATION 181(2021):10. |
入库方式： OAI收割
来源：金属研究所
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