Yttrium induced formation of new pores in an as-cast nickel-based single crystal superalloy
文献类型：期刊论文
| 作者 | Wang, N.1,2; Liu, J. D.1; Xu, W.2; Li, J. G.1 |
| 刊名 | MATERIALS CHARACTERIZATION
 |
| 出版日期 | 2024-09-01 |
| 卷号 | 215页码:11 |
| 关键词 | Micro-pores Shrinkage pores Single crystal superalloy Yttrium element Surface tension |
| ISSN号 | 1044-5803 |
| DOI | 10.1016/j.matchar.2024.114192 |
| 通讯作者 | Liu, J. D.(jdliu@imr.ac.cn) ; Li, J. G.(jgli@imr.ac.cn) |
| 英文摘要 | Pores are the most fatal defects in single crystal superalloys, which severely deteriorates the mechanical properties. Yttrium (Y) has been applied in commercial superalloys, but its effect on the morphology change of casting pores is not clear. This work focuses on the effect of Y on the evolution of pores formed after directional solidification in a second-generation superalloy. SEM, TEM and XRT were used to characterize the pores, and Thermo-Calc was used to calculate the surface tension change during the solidification process. Results show that, besides the formation of two types of conventional shrinkage pores during solidification, new types of pores, i.e., Type III and Type IV, due to the addition of Y element to 0.5 wt% in superalloy, were also observed. The formation of Type III pore could be ascribed to the surface tension drop in the liquid phase, which enhances the wettability at the solid/liquid interface, and promotes the mobility of liquid phase, due to the incorporation of Y element. The formation of Type IV pore is due to the simultaneous formation and growth of M23C6 and Ni3Al in the Ni5Y phase, triggering the formation of closed zone with a small but irregular shape at the multi-phase interface. |
| 资助项目 | National Science and Technology Major Project[J2019-VI-0023-0139] ; National Science and Technology Major Project[J2019-VII-0004-0144] ; National Key R & D Program of China[2020YFA0714904] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001285079200001 |
| 出版者 | ELSEVIER SCIENCE INC |
| 资助机构 | National Science and Technology Major Project ; National Key R & D Program of China |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Liu, J. D.; Li, J. G. |
| 作者单位 | 1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, N.,Liu, J. D.,Xu, W.,et al. Yttrium induced formation of new pores in an as-cast nickel-based single crystal superalloy[J]. MATERIALS CHARACTERIZATION,2024,215:11. |
| APA | Wang, N.,Liu, J. D.,Xu, W.,&Li, J. G..(2024).Yttrium induced formation of new pores in an as-cast nickel-based single crystal superalloy.MATERIALS CHARACTERIZATION,215,11. |
| MLA | Wang, N.,et al."Yttrium induced formation of new pores in an as-cast nickel-based single crystal superalloy".MATERIALS CHARACTERIZATION 215(2024):11. |
入库方式： OAI收割
来源：金属研究所
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