Thin-walled effect of microstructure of third-generation single crystal superalloy DD9
The microstructure and thin-walled effect of different samples （double-wall ultra-cooling turbine blades， combined cooling turbine blades， investment casting thin-walled specimen， and round bar specimen） of the third-generation single crystal superalloy DD9 are investigated by optical microscope， fi...
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2025-01-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2024.000210 |
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| author | YANG Wanpeng LI Jiarong LIU Shizhong ZHAO Jinqian WANG Xiaoguang YANG Liang WANG Rui CHEN Qiao |
| author_facet | YANG Wanpeng LI Jiarong LIU Shizhong ZHAO Jinqian WANG Xiaoguang YANG Liang WANG Rui CHEN Qiao |
| author_sort | YANG Wanpeng |
| collection | DOAJ |
| description | The microstructure and thin-walled effect of different samples （double-wall ultra-cooling turbine blades， combined cooling turbine blades， investment casting thin-walled specimen， and round bar specimen） of the third-generation single crystal superalloy DD9 are investigated by optical microscope， field emission scanning electron microscope， and electron probe apparatus. The results show that there are differences in the microstructures of the four specimens. When the section sizes are the same， the as-cast primary dendrite arm spacing， the sizes of γ′ phases， and the dendrite segregation of the as-cast and heat- treated specimens of DD9 single crystal turbine blades are all larger than those of the investment casting thin-walled specimens. After full heat treatment， the sizes of the γ′ phases of single crystal turbine blades with the same cross-sectional size are similar to those of investment casting thin-walled specimens. The as-cast primary dendrite arm spacing， the sizes of γ′ phases， and the dendrite segregation of the as-cast and heat-treated thin-walled specimens of DD9 alloy all decrease with the decrease of the cross-sectional size. |
| format | Article |
| id | doaj-art-0153ba0b77cb40c5951767d354320e76 |
| institution | Kabale University |
| issn | 1001-4381 |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj-art-0153ba0b77cb40c5951767d354320e762025-01-21T09:44:41ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43812025-01-01531556410.11868/j.issn.1001-4381.2024.0002101001-4381（2025）01-0055-10Thin-walled effect of microstructure of third-generation single crystal superalloy DD9YANG Wanpeng0LI Jiarong1LIU Shizhong2ZHAO Jinqian3WANG Xiaoguang4YANG Liang5WANG Rui6CHEN Qiao7Key Laboratory of Advanced High Temperature Structural Materials， AECC Beijing Institute of Aeronautical Materials，Beijing 100095，ChinaKey Laboratory of Advanced High Temperature Structural Materials， AECC Beijing Institute of Aeronautical Materials，Beijing 100095，ChinaKey Laboratory of Advanced High Temperature Structural Materials， AECC Beijing Institute of Aeronautical Materials，Beijing 100095，ChinaKey Laboratory of Advanced High Temperature Structural Materials， AECC Beijing Institute of Aeronautical Materials，Beijing 100095，ChinaKey Laboratory of Advanced High Temperature Structural Materials， AECC Beijing Institute of Aeronautical Materials，Beijing 100095，ChinaKey Laboratory of Advanced High Temperature Structural Materials， AECC Beijing Institute of Aeronautical Materials，Beijing 100095，ChinaKey Laboratory of Advanced High Temperature Structural Materials， AECC Beijing Institute of Aeronautical Materials，Beijing 100095，ChinaKey Laboratory of Advanced High Temperature Structural Materials， AECC Beijing Institute of Aeronautical Materials，Beijing 100095，ChinaThe microstructure and thin-walled effect of different samples （double-wall ultra-cooling turbine blades， combined cooling turbine blades， investment casting thin-walled specimen， and round bar specimen） of the third-generation single crystal superalloy DD9 are investigated by optical microscope， field emission scanning electron microscope， and electron probe apparatus. The results show that there are differences in the microstructures of the four specimens. When the section sizes are the same， the as-cast primary dendrite arm spacing， the sizes of γ′ phases， and the dendrite segregation of the as-cast and heat- treated specimens of DD9 single crystal turbine blades are all larger than those of the investment casting thin-walled specimens. After full heat treatment， the sizes of the γ′ phases of single crystal turbine blades with the same cross-sectional size are similar to those of investment casting thin-walled specimens. The as-cast primary dendrite arm spacing， the sizes of γ′ phases， and the dendrite segregation of the as-cast and heat-treated thin-walled specimens of DD9 alloy all decrease with the decrease of the cross-sectional size.https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2024.000210third-generation single crystal superalloydd9turbine bladecross-sectional sizethin-walled effect |
| spellingShingle | YANG Wanpeng LI Jiarong LIU Shizhong ZHAO Jinqian WANG Xiaoguang YANG Liang WANG Rui CHEN Qiao Thin-walled effect of microstructure of third-generation single crystal superalloy DD9 Cailiao gongcheng third-generation single crystal superalloy dd9 turbine blade cross-sectional size thin-walled effect |
| title | Thin-walled effect of microstructure of third-generation single crystal superalloy DD9 |
| title_full | Thin-walled effect of microstructure of third-generation single crystal superalloy DD9 |
| title_fullStr | Thin-walled effect of microstructure of third-generation single crystal superalloy DD9 |
| title_full_unstemmed | Thin-walled effect of microstructure of third-generation single crystal superalloy DD9 |
| title_short | Thin-walled effect of microstructure of third-generation single crystal superalloy DD9 |
| title_sort | thin walled effect of microstructure of third generation single crystal superalloy dd9 |
| topic | third-generation single crystal superalloy dd9 turbine blade cross-sectional size thin-walled effect |
| url | https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2024.000210 |
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