| Microstructure and hot ductility behavior of Ni-based superalloy U720Li with boron addition | |
| Zhao Guang-Di1; Liu Fang2; Zang Xi-Min1; Sun Wen-Ru2 | |
| Corresponding Author | Sun Wen-Ru() |
| 2020-04-27 | |
| Source Publication | RARE METALS
 |
| ISSN | 1001-0521 |
| Pages | 10 |
| Abstract | 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. |
| Keyword | Boron U720Li Eutectic (gamma plus gamma ') Hot ductility Fracture mechanism |
| Funding Organization | National Natural Science Foundation of China |
| DOI | 10.1007/s12598-020-01395-4 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[U1560203] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000529135000001 |
| Publisher | NONFERROUS METALS SOC CHINA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/138550 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Sun Wen-Ru |
| Affiliation | 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 |
| Recommended Citation 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. |
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