Creep Damage Repair of a Nickel-Based Single Crystal Superalloy Based on Heat Treatment
Taking nickel-based single crystal superalloy DD6 as the research object, different degrees of creep damage were prefabricated by creep interruption tests, and then the creep damage was repaired by the restoration heat treatment system of solid solution heat treatment and two-stage aging heat treatm...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/4/623 |
| _version_ | 1797537859114106880 |
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| author | Xiaoyan Wang Meng Li Yuansheng Wang Chengjiang Zhang Zhixun Wen |
| author_facet | Xiaoyan Wang Meng Li Yuansheng Wang Chengjiang Zhang Zhixun Wen |
| author_sort | Xiaoyan Wang |
| collection | DOAJ |
| description | Taking nickel-based single crystal superalloy DD6 as the research object, different degrees of creep damage were prefabricated by creep interruption tests, and then the creep damage was repaired by the restoration heat treatment system of solid solution heat treatment and two-stage aging heat treatment. The results show that with the creep time increasing, the alloy underwent microstructure evolution including γ′ phase coarsening, N-type rafting and de-rafting. After the restoration heat treatment, the coarse rafted γ′ phase of creep damaged specimens dissolved, precipitated, grew up, and became cubic again. Except for the specimens with creep interruption of 100 h, the γ′ phase can basically achieve the same arrangement as the γ′ phase of the original sample. The comparison of the secondary creep test shows that the steady-state creep stage of the test piece after the restoration heat treatment is relatively increased, and the total creep life can reach the same level as the primary creep life. The high temperature creep properties of the tested alloy are basically recovered, and the restoration heat treatment effect is good. |
| first_indexed | 2024-03-10T12:22:15Z |
| format | Article |
| id | doaj.art-79b809ef187f49f7b1db1c79e7ea2e63 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T12:22:15Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-79b809ef187f49f7b1db1c79e7ea2e632023-11-21T15:22:07ZengMDPI AGMetals2075-47012021-04-0111462310.3390/met11040623Creep Damage Repair of a Nickel-Based Single Crystal Superalloy Based on Heat TreatmentXiaoyan Wang0Meng Li1Yuansheng Wang2Chengjiang Zhang3Zhixun Wen4School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, ChinaSchool of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi’an 710072, ChinaTaking nickel-based single crystal superalloy DD6 as the research object, different degrees of creep damage were prefabricated by creep interruption tests, and then the creep damage was repaired by the restoration heat treatment system of solid solution heat treatment and two-stage aging heat treatment. The results show that with the creep time increasing, the alloy underwent microstructure evolution including γ′ phase coarsening, N-type rafting and de-rafting. After the restoration heat treatment, the coarse rafted γ′ phase of creep damaged specimens dissolved, precipitated, grew up, and became cubic again. Except for the specimens with creep interruption of 100 h, the γ′ phase can basically achieve the same arrangement as the γ′ phase of the original sample. The comparison of the secondary creep test shows that the steady-state creep stage of the test piece after the restoration heat treatment is relatively increased, and the total creep life can reach the same level as the primary creep life. The high temperature creep properties of the tested alloy are basically recovered, and the restoration heat treatment effect is good.https://www.mdpi.com/2075-4701/11/4/623nickel-based single crystal superalloycreep interruptioncreep damagerestoration heat treatmentmicrostructures |
| spellingShingle | Xiaoyan Wang Meng Li Yuansheng Wang Chengjiang Zhang Zhixun Wen Creep Damage Repair of a Nickel-Based Single Crystal Superalloy Based on Heat Treatment Metals nickel-based single crystal superalloy creep interruption creep damage restoration heat treatment microstructures |
| title | Creep Damage Repair of a Nickel-Based Single Crystal Superalloy Based on Heat Treatment |
| title_full | Creep Damage Repair of a Nickel-Based Single Crystal Superalloy Based on Heat Treatment |
| title_fullStr | Creep Damage Repair of a Nickel-Based Single Crystal Superalloy Based on Heat Treatment |
| title_full_unstemmed | Creep Damage Repair of a Nickel-Based Single Crystal Superalloy Based on Heat Treatment |
| title_short | Creep Damage Repair of a Nickel-Based Single Crystal Superalloy Based on Heat Treatment |
| title_sort | creep damage repair of a nickel based single crystal superalloy based on heat treatment |
| topic | nickel-based single crystal superalloy creep interruption creep damage restoration heat treatment microstructures |
| url | https://www.mdpi.com/2075-4701/11/4/623 |
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