Effect of long term ageing on γ' phase in spray formed FGH100L superalloy settled by different solution treatment
The effects of long term ageing on the size and morphology of γ' precipitations in the spray formed nickel-based superalloy FGH100L after subsolvs and supersolvs heat treatment (HT) were studied by scanning electron microscope (SEM). The results show that there are four kinds of γ' phases...
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Editorial Office of Powder Metallurgy Technology
2021-12-01
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| Series: | Fenmo yejin jishu |
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| Online Access: | https://pmt.ustb.edu.cn/article/doi/10.19591/j.cnki.cn11-1974/tf.2020100017 |
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| author | PENG Shi-qing GE Chang-chun TIAN Tian HAO Zhi-bo ZHAO Bo |
| author_facet | PENG Shi-qing GE Chang-chun TIAN Tian HAO Zhi-bo ZHAO Bo |
| author_sort | PENG Shi-qing |
| collection | DOAJ |
| description | The effects of long term ageing on the size and morphology of γ' precipitations in the spray formed nickel-based superalloy FGH100L after subsolvs and supersolvs heat treatment (HT) were studied by scanning electron microscope (SEM). The results show that there are four kinds of γ' phases in the alloys after the subsolvs HT, and during the long term ageing, the sizes of primary, secondary, and large tertiary γ' phases increase while the size of small tertiary γ' phase decreases. None of these γ' phases grow in accordance with the coarsening kinetics as the Lifshitz, Slyozov, and Wagner (LWS) theory during the long term ageing. Apart from the small tertiary γ' phase, other three kinds of γ' phases began splitting in a similar way, and the secondary γ' phase shows the unstable protrusion after ageing for 500 h. No topological close packed (TCP) phase is found in the subsolvs HTed alloys. There are three kinds of γ' phases in the alloys after the supersolvs HT, and during the long term ageing, the primary γ' phase grows up slightly while the secondary and tertiary γ' phases show no obvious change. None of these γ' phases grow in accordance with the coarsening kinetics as LWS theory during the long term ageing. The morphology of primary and tertiary γ' phases changes little, and the secondary γ' phase is splitting at the early stage. No TCP phase is found in the supersolvs HTed alloys. The size and morphology variations of γ' phases in the supersolvs HTed alloys are smaller than those in the subsolvs HTed alloys, indicating that the former has the better microstructure stability. |
| format | Article |
| id | doaj-art-86b248e4a80341f1bb0c8b6cc75bb123 |
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| issn | 1001-3784 |
| language | zho |
| publishDate | 2021-12-01 |
| publisher | Editorial Office of Powder Metallurgy Technology |
| record_format | Article |
| series | Fenmo yejin jishu |
| spelling | doaj-art-86b248e4a80341f1bb0c8b6cc75bb1232025-08-20T01:59:00ZzhoEditorial Office of Powder Metallurgy TechnologyFenmo yejin jishu1001-37842021-12-0139648348910.19591/j.cnki.cn11-1974/tf.2020100017Effect of long term ageing on γ' phase in spray formed FGH100L superalloy settled by different solution treatmentPENG Shi-qing0GE Chang-chun1TIAN Tian2HAO Zhi-bo3ZHAO Bo4School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaHigh Temperature Material Research Institute, Central Iron and Steel Research Institute, Beijing 100081, ChinaHigh Temperature Material Research Institute, Central Iron and Steel Research Institute, Beijing 100081, ChinaSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaThe effects of long term ageing on the size and morphology of γ' precipitations in the spray formed nickel-based superalloy FGH100L after subsolvs and supersolvs heat treatment (HT) were studied by scanning electron microscope (SEM). The results show that there are four kinds of γ' phases in the alloys after the subsolvs HT, and during the long term ageing, the sizes of primary, secondary, and large tertiary γ' phases increase while the size of small tertiary γ' phase decreases. None of these γ' phases grow in accordance with the coarsening kinetics as the Lifshitz, Slyozov, and Wagner (LWS) theory during the long term ageing. Apart from the small tertiary γ' phase, other three kinds of γ' phases began splitting in a similar way, and the secondary γ' phase shows the unstable protrusion after ageing for 500 h. No topological close packed (TCP) phase is found in the subsolvs HTed alloys. There are three kinds of γ' phases in the alloys after the supersolvs HT, and during the long term ageing, the primary γ' phase grows up slightly while the secondary and tertiary γ' phases show no obvious change. None of these γ' phases grow in accordance with the coarsening kinetics as LWS theory during the long term ageing. The morphology of primary and tertiary γ' phases changes little, and the secondary γ' phase is splitting at the early stage. No TCP phase is found in the supersolvs HTed alloys. The size and morphology variations of γ' phases in the supersolvs HTed alloys are smaller than those in the subsolvs HTed alloys, indicating that the former has the better microstructure stability.https://pmt.ustb.edu.cn/article/doi/10.19591/j.cnki.cn11-1974/tf.2020100017nickel-based superalloyslong-term ageingγ' phasespray formingsolution treatment |
| spellingShingle | PENG Shi-qing GE Chang-chun TIAN Tian HAO Zhi-bo ZHAO Bo Effect of long term ageing on γ' phase in spray formed FGH100L superalloy settled by different solution treatment Fenmo yejin jishu nickel-based superalloys long-term ageing γ' phase spray forming solution treatment |
| title | Effect of long term ageing on γ' phase in spray formed FGH100L superalloy settled by different solution treatment |
| title_full | Effect of long term ageing on γ' phase in spray formed FGH100L superalloy settled by different solution treatment |
| title_fullStr | Effect of long term ageing on γ' phase in spray formed FGH100L superalloy settled by different solution treatment |
| title_full_unstemmed | Effect of long term ageing on γ' phase in spray formed FGH100L superalloy settled by different solution treatment |
| title_short | Effect of long term ageing on γ' phase in spray formed FGH100L superalloy settled by different solution treatment |
| title_sort | effect of long term ageing on γ phase in spray formed fgh100l superalloy settled by different solution treatment |
| topic | nickel-based superalloys long-term ageing γ' phase spray forming solution treatment |
| url | https://pmt.ustb.edu.cn/article/doi/10.19591/j.cnki.cn11-1974/tf.2020100017 |
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