Microstructure and hot ductility behavior of Ni-based superalloy U720Li with boron addition
文献类型：期刊论文
| 作者 | Zhao Guang-Di1; Liu Fang2; Zang Xi-Min1; Sun Wen-Ru2 |
| 刊名 | RARE METALS
 |
| 出版日期 | 2020-04-27 |
| 页码 | 10 |
| 关键词 | Boron U720Li Eutectic (gamma plus gamma ') Hot ductility Fracture mechanism |
| ISSN号 | 1001-0521 |
| DOI | 10.1007/s12598-020-01395-4 |
| 通讯作者 | Sun Wen-Ru() |
| 英文摘要 | High-alloyed superalloy U720Li is difficult to be processed through the conventional cast and wrought route. Boron is an important strengthening element for superalloys, but the role of boron in the hot ductility of U720Li alloy is not clear. This study is focused on the effect of boron addition, in the range of < 0.0005 wt%-0.0240 wt%, on the microstructure and hot ductility behavior of superalloy U720Li. It is found that boron addition significantly increases the content of eutectic (gamma + gamma ') and greatly affects the degree of continuity of the grain boundary eutectic (gamma + gamma ') precipitation. Boron addition dramatically worsens the 1100 degrees C tensile ductility of conventional cast U720Li alloy and causes a change in tensile fracture mode from transgranular to intergranular. The eutectic (gamma + gamma ') represents the most effective site for crack initiation. Boron deteriorates the hot ductility mainly by promoting the continuous precipitation of eutectic (gamma + gamma ') along the grain boundary. |
| 资助项目 | National Natural Science Foundation of China[U1560203] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000529135000001 |
| 出版者 | NONFERROUS METALS SOC CHINA |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/138549]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Sun Wen-Ru |
| 作者单位 | 1.Univ Sci & Technol Liaoning, Sch Met & Mat, Anshan 114051, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao Guang-Di,Liu Fang,Zang Xi-Min,et al. Microstructure and hot ductility behavior of Ni-based superalloy U720Li with boron addition[J]. RARE METALS,2020:10. |
| APA | Zhao Guang-Di,Liu Fang,Zang Xi-Min,&Sun Wen-Ru.(2020).Microstructure and hot ductility behavior of Ni-based superalloy U720Li with boron addition.RARE METALS,10. |
| MLA | Zhao Guang-Di,et al."Microstructure and hot ductility behavior of Ni-based superalloy U720Li with boron addition".RARE METALS (2020):10. |
入库方式： OAI收割
来源：金属研究所
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