Microstructure evolution and recrystallization behavior of two nickel-based single crystal superalloys
This study focuses on the single crystal （SC） superalloys CMSX-4 and DD5， designing and fabricating a SC test plate casting with five distinct stages. Castings with the same crystal orientation are selected to investigate their recrystallization （RX） behavior after solution heat treatment at 1300 ℃...
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Journal of Materials Engineering
2025-01-01
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| Series: | Cailiao gongcheng |
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| Online Access: | https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2024.000381 |
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| author | XU Fuze LIN Yongcheng MA Dexin HE Daoguang ZHAO Yunxing LI Lyu CHENG Bowen DENG Yangpi |
| author_facet | XU Fuze LIN Yongcheng MA Dexin HE Daoguang ZHAO Yunxing LI Lyu CHENG Bowen DENG Yangpi |
| author_sort | XU Fuze |
| collection | DOAJ |
| description | This study focuses on the single crystal （SC） superalloys CMSX-4 and DD5， designing and fabricating a SC test plate casting with five distinct stages. Castings with the same crystal orientation are selected to investigate their recrystallization （RX） behavior after solution heat treatment at 1300 ℃ for 2 h and 1310 ℃ for 4 h. The results indicate that CMSX-4 exhibits a stronger tendency for RX compared to DD5. Following a solution heat treatment at 1300 ℃， the CMSX-4 SC test plate displayed RX at the lower corners of 2-5 stage platforms， with the extent of RX expanding as the solution heat treatment temperature rose. Conversely， no RX was detected in the DD5 SC test plate post-treatment at 1300 ℃. Elevating the solution temperature to 1310 ℃ results in only a minor area of RX on the outer platform of the fourth stage in the DD5 SC test plate. The micro-shrinkage porosity and eutectic content of the as-cast and solution heat treated CMSX-4 alloy are both higher than those of the DD5 alloy. The higher content of eutectic and micro-shrinkage porosity provides more nucleation sites and quantities for RX in the CMSX-4 alloy， while the solution heat treatment temperatures above the γ' phase dissolution temperature weakens the pinning effect of coarse γ' phase on RX growth， and high melting point carbides and residual eutectic become important factors hindering RX growth. In addition， the high content of Co element reduces the stacking fault energy of the CMSX-4 alloy， making it with a high recrystallization tendency. |
| format | Article |
| id | doaj-art-16d38d16ce8544d4a86134f67410dcc1 |
| 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-16d38d16ce8544d4a86134f67410dcc12025-01-21T09:44:41ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43812025-01-0153111012010.11868/j.issn.1001-4381.2024.0003811001-4381（2025）01-0110-11Microstructure evolution and recrystallization behavior of two nickel-based single crystal superalloysXU Fuze0LIN Yongcheng1MA Dexin2HE Daoguang3ZHAO Yunxing4LI Lyu5CHENG Bowen6DENG Yangpi7School of Mechanical and Electrical Engineering，Central South University，Changsha 410083，ChinaSchool of Mechanical and Electrical Engineering，Central South University，Changsha 410083，ChinaShenzhen Wedge Central South Research Institute Co.，Ltd.，Shenzhen 518045，Guangdong， ChinaSchool of Mechanical and Electrical Engineering，Central South University，Changsha 410083，ChinaShenzhen Wedge Central South Research Institute Co.，Ltd.，Shenzhen 518045，Guangdong， ChinaShenzhen Wedge Central South Research Institute Co.，Ltd.，Shenzhen 518045，Guangdong， ChinaShenzhen Wedge Central South Research Institute Co.，Ltd.，Shenzhen 518045，Guangdong， ChinaShenzhen Wedge Central South Research Institute Co.，Ltd.，Shenzhen 518045，Guangdong， ChinaThis study focuses on the single crystal （SC） superalloys CMSX-4 and DD5， designing and fabricating a SC test plate casting with five distinct stages. Castings with the same crystal orientation are selected to investigate their recrystallization （RX） behavior after solution heat treatment at 1300 ℃ for 2 h and 1310 ℃ for 4 h. The results indicate that CMSX-4 exhibits a stronger tendency for RX compared to DD5. Following a solution heat treatment at 1300 ℃， the CMSX-4 SC test plate displayed RX at the lower corners of 2-5 stage platforms， with the extent of RX expanding as the solution heat treatment temperature rose. Conversely， no RX was detected in the DD5 SC test plate post-treatment at 1300 ℃. Elevating the solution temperature to 1310 ℃ results in only a minor area of RX on the outer platform of the fourth stage in the DD5 SC test plate. The micro-shrinkage porosity and eutectic content of the as-cast and solution heat treated CMSX-4 alloy are both higher than those of the DD5 alloy. The higher content of eutectic and micro-shrinkage porosity provides more nucleation sites and quantities for RX in the CMSX-4 alloy， while the solution heat treatment temperatures above the γ' phase dissolution temperature weakens the pinning effect of coarse γ' phase on RX growth， and high melting point carbides and residual eutectic become important factors hindering RX growth. In addition， the high content of Co element reduces the stacking fault energy of the CMSX-4 alloy， making it with a high recrystallization tendency.https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2024.000381single crystal superalloycmsx-4dd5recrystallizationplastic strain |
| spellingShingle | XU Fuze LIN Yongcheng MA Dexin HE Daoguang ZHAO Yunxing LI Lyu CHENG Bowen DENG Yangpi Microstructure evolution and recrystallization behavior of two nickel-based single crystal superalloys Cailiao gongcheng single crystal superalloy cmsx-4 dd5 recrystallization plastic strain |
| title | Microstructure evolution and recrystallization behavior of two nickel-based single crystal superalloys |
| title_full | Microstructure evolution and recrystallization behavior of two nickel-based single crystal superalloys |
| title_fullStr | Microstructure evolution and recrystallization behavior of two nickel-based single crystal superalloys |
| title_full_unstemmed | Microstructure evolution and recrystallization behavior of two nickel-based single crystal superalloys |
| title_short | Microstructure evolution and recrystallization behavior of two nickel-based single crystal superalloys |
| title_sort | microstructure evolution and recrystallization behavior of two nickel based single crystal superalloys |
| topic | single crystal superalloy cmsx-4 dd5 recrystallization plastic strain |
| url | https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2024.000381 |
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