Effects of Cobalt on solidification characteristics and as-cast microstructure of an advanced nickel-based single crystal superalloys
Containing Re and Ru, an advanced Ni-based single crystal superalloys with different cobalt (Co) content (5.9 wt.%, 9.0 wt.% and 12.0 wt.%, respectively) were investigated to study the effects of Co on solidification characteristics and as-cast microstructure. In the aspect of solidification charact...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422013412 |
| _version_ | 1797991980392775680 |
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| author | Qinghai Pan Xinbao Zhao Quanzhao Yue Wanshun Xia Yuefeng Gu Qingqing Ding Ze Zhang |
| author_facet | Qinghai Pan Xinbao Zhao Quanzhao Yue Wanshun Xia Yuefeng Gu Qingqing Ding Ze Zhang |
| author_sort | Qinghai Pan |
| collection | DOAJ |
| description | Containing Re and Ru, an advanced Ni-based single crystal superalloys with different cobalt (Co) content (5.9 wt.%, 9.0 wt.% and 12.0 wt.%, respectively) were investigated to study the effects of Co on solidification characteristics and as-cast microstructure. In the aspect of solidification characteristics, the solidus, especially the precipitation temperature of γ′ phase of the alloys decreases gradually with the increase of Co. Furthermore, the dendritic segregation of refractory elements, such as Re, W and Cr, is restrained. With regard to as-cast microstructure, the results show that primary dendrite spacing shorten significantly since Co increased from 5.9 to 9.0 wt.%, and the content of γ/γ′ eutectic is lowest in the alloy with 9.0 wt.% Co. The addition of Co decreases the size of γ′ and homogenizes the size of γ′ between the dendrite core and the interdendritic region. A customized heat treatment schedule is implemented for the three alloys based on the research. |
| first_indexed | 2024-04-11T09:00:40Z |
| format | Article |
| id | doaj.art-9257eb4714cf4783aff92f313ac9148f |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-11T09:00:40Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj.art-9257eb4714cf4783aff92f313ac9148f2022-12-22T04:32:47ZengElsevierJournal of Materials Research and Technology2238-78542022-09-012030743082Effects of Cobalt on solidification characteristics and as-cast microstructure of an advanced nickel-based single crystal superalloysQinghai Pan0Xinbao Zhao1Quanzhao Yue2Wanshun Xia3Yuefeng Gu4Qingqing Ding5Ze Zhang6Institute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR ChinaCorresponding author.; Institute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR ChinaCorresponding author.; Institute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR ChinaInstitute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR ChinaInstitute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR ChinaInstitute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR ChinaInstitute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR ChinaContaining Re and Ru, an advanced Ni-based single crystal superalloys with different cobalt (Co) content (5.9 wt.%, 9.0 wt.% and 12.0 wt.%, respectively) were investigated to study the effects of Co on solidification characteristics and as-cast microstructure. In the aspect of solidification characteristics, the solidus, especially the precipitation temperature of γ′ phase of the alloys decreases gradually with the increase of Co. Furthermore, the dendritic segregation of refractory elements, such as Re, W and Cr, is restrained. With regard to as-cast microstructure, the results show that primary dendrite spacing shorten significantly since Co increased from 5.9 to 9.0 wt.%, and the content of γ/γ′ eutectic is lowest in the alloy with 9.0 wt.% Co. The addition of Co decreases the size of γ′ and homogenizes the size of γ′ between the dendrite core and the interdendritic region. A customized heat treatment schedule is implemented for the three alloys based on the research.http://www.sciencedirect.com/science/article/pii/S2238785422013412Nickel-based single crystal superalloysCobaltSolidification characteristicsSegregation |
| spellingShingle | Qinghai Pan Xinbao Zhao Quanzhao Yue Wanshun Xia Yuefeng Gu Qingqing Ding Ze Zhang Effects of Cobalt on solidification characteristics and as-cast microstructure of an advanced nickel-based single crystal superalloys Journal of Materials Research and Technology Nickel-based single crystal superalloys Cobalt Solidification characteristics Segregation |
| title | Effects of Cobalt on solidification characteristics and as-cast microstructure of an advanced nickel-based single crystal superalloys |
| title_full | Effects of Cobalt on solidification characteristics and as-cast microstructure of an advanced nickel-based single crystal superalloys |
| title_fullStr | Effects of Cobalt on solidification characteristics and as-cast microstructure of an advanced nickel-based single crystal superalloys |
| title_full_unstemmed | Effects of Cobalt on solidification characteristics and as-cast microstructure of an advanced nickel-based single crystal superalloys |
| title_short | Effects of Cobalt on solidification characteristics and as-cast microstructure of an advanced nickel-based single crystal superalloys |
| title_sort | effects of cobalt on solidification characteristics and as cast microstructure of an advanced nickel based single crystal superalloys |
| topic | Nickel-based single crystal superalloys Cobalt Solidification characteristics Segregation |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422013412 |
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