Effect of Ru on microstructure evolution of the fourth generation nickel-based single crystal superalloy DD22 during long-term aging
The morphological evolution of γ′ phase, the precipitation of TCP phases and the evolution of the interfacial dislocation networks in DD22 nickel-based single crystal superalloys with different Ru contents (3% and 5%, mass fraction) were investigated by transmission electron microscopy and field emi...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2022-09-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.000105 |
| _version_ | 1797963230458413056 |
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| author | ZHAO Yunsong YANG Zhao CHEN Ruizhi ZHANG Jian LUO Yushi LIU Lirong |
| author_facet | ZHAO Yunsong YANG Zhao CHEN Ruizhi ZHANG Jian LUO Yushi LIU Lirong |
| author_sort | ZHAO Yunsong |
| collection | DOAJ |
| description | The morphological evolution of γ′ phase, the precipitation of TCP phases and the evolution of the interfacial dislocation networks in DD22 nickel-based single crystal superalloys with different Ru contents (3% and 5%, mass fraction) were investigated by transmission electron microscopy and field emission scanning electron microscopy during long-term aging at 1130 ℃. The results show that γ′ phase of 5Ru alloy are smaller in size and more regular in shape than that of 3Ru alloy. The mismatch of γ/γ′ phases is larger in 5Ru alloy, and the high content of Ru causes the reverse distribution of elements such as Re and Mo. During long-term aging at 1130 ℃, the coarsening rate, dissolution rate and rafting rate of γ′ phase in 5Ru alloy are lower than those of 3Ru alloy. There is still no TCP phase precipitation in 5Ru alloy after long-term aging for 1000 h, while a small amount of TCP phase is precipitated in 3Ru alloy after long-term aging for 50 h. With the prolongation of long-term aging time, the number and size of TCP phases both increase. Compared with 3Ru alloy, the interfacial dislocation networks of 5Ru alloy are denser and more regular after long-term aging for 1000 h. Above all, the reverse distribution of elements and low diffusion coefficient of Ru make 5Ru alloy exhibit higher microstructural stability than 3Ru alloy. |
| first_indexed | 2024-04-11T01:25:02Z |
| format | Article |
| id | doaj.art-888fc1de4b554f2a8b3c51dc42002a3b |
| institution | Directory Open Access Journal |
| issn | 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T01:25:02Z |
| publishDate | 2022-09-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-888fc1de4b554f2a8b3c51dc42002a3b2023-01-03T10:23:59ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43812022-09-0150912713610.11868/j.issn.1001-4381.2022.00010520220914Effect of Ru on microstructure evolution of the fourth generation nickel-based single crystal superalloy DD22 during long-term agingZHAO Yunsong0YANG Zhao1CHEN Ruizhi2ZHANG Jian3LUO Yushi4LIU Lirong5Science and Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaAviation Military Representative Office of Army Equipment Department in Beijing, Beijing 100041, ChinaSchool of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, ChinaScience and Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaScience and Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaSchool of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, ChinaThe morphological evolution of γ′ phase, the precipitation of TCP phases and the evolution of the interfacial dislocation networks in DD22 nickel-based single crystal superalloys with different Ru contents (3% and 5%, mass fraction) were investigated by transmission electron microscopy and field emission scanning electron microscopy during long-term aging at 1130 ℃. The results show that γ′ phase of 5Ru alloy are smaller in size and more regular in shape than that of 3Ru alloy. The mismatch of γ/γ′ phases is larger in 5Ru alloy, and the high content of Ru causes the reverse distribution of elements such as Re and Mo. During long-term aging at 1130 ℃, the coarsening rate, dissolution rate and rafting rate of γ′ phase in 5Ru alloy are lower than those of 3Ru alloy. There is still no TCP phase precipitation in 5Ru alloy after long-term aging for 1000 h, while a small amount of TCP phase is precipitated in 3Ru alloy after long-term aging for 50 h. With the prolongation of long-term aging time, the number and size of TCP phases both increase. Compared with 3Ru alloy, the interfacial dislocation networks of 5Ru alloy are denser and more regular after long-term aging for 1000 h. Above all, the reverse distribution of elements and low diffusion coefficient of Ru make 5Ru alloy exhibit higher microstructural stability than 3Ru alloy.http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.000105dd22 nickel-based single crystal superalloyru contentlong-term agingdislocation networksmicrostructural stability |
| spellingShingle | ZHAO Yunsong YANG Zhao CHEN Ruizhi ZHANG Jian LUO Yushi LIU Lirong Effect of Ru on microstructure evolution of the fourth generation nickel-based single crystal superalloy DD22 during long-term aging Cailiao gongcheng dd22 nickel-based single crystal superalloy ru content long-term aging dislocation networks microstructural stability |
| title | Effect of Ru on microstructure evolution of the fourth generation nickel-based single crystal superalloy DD22 during long-term aging |
| title_full | Effect of Ru on microstructure evolution of the fourth generation nickel-based single crystal superalloy DD22 during long-term aging |
| title_fullStr | Effect of Ru on microstructure evolution of the fourth generation nickel-based single crystal superalloy DD22 during long-term aging |
| title_full_unstemmed | Effect of Ru on microstructure evolution of the fourth generation nickel-based single crystal superalloy DD22 during long-term aging |
| title_short | Effect of Ru on microstructure evolution of the fourth generation nickel-based single crystal superalloy DD22 during long-term aging |
| title_sort | effect of ru on microstructure evolution of the fourth generation nickel based single crystal superalloy dd22 during long term aging |
| topic | dd22 nickel-based single crystal superalloy ru content long-term aging dislocation networks microstructural stability |
| url | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.000105 |
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