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Revealing microstru...
Revealing microstructural degradation mechanism induced by interdiffusion between Amdry365 coating and IN792 superalloy
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- Sun, Xiaoyu (författare)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten
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- Li, Xiaolong (författare)
- Department of Industrial and Materials Science, Chalmers University of Technology, Gothenburg, Sweden
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- Guo, Sheng (författare)
- Department of Industrial and Materials Science, Chalmers University of Technology, Gothenburg, Sweden
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- Yu, Xin (författare)
- Institute for Advanced Studies in Precision Materials, Yantai University, Yantai, Shandong, China
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- Zhu, Lilong (författare)
- Institute for Advanced Studies in Precision Materials, Yantai University, Yantai, Shandong, China
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- Teng, Jianwei (författare)
- Institute for Advanced Studies in Precision Materials, Yantai University, Yantai, Shandong, China
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- Jiang, Liang (författare)
- Institute for Advanced Studies in Precision Materials, Yantai University, Yantai, Shandong, China
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- Moverare, Johan (författare)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten
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- Li, Xin-Hai (författare)
- Siemens Energy AB, SE-61283 Finspång, Sweden
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- Peng, Ru Lin (författare)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten
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(creator_code:org_t)
- ELSEVIER SCI LTD, 2024
- 2024
- Engelska.
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Ingår i: Materials & design. - : ELSEVIER SCI LTD. - 0264-1275 .- 1873-4197. ; 241
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Metallic coatings are widely employed to improve the oxidation resistance of superalloys. However, the interdiffusion between the metallic coatings and the superalloys leads to microstructural degradation in both. Some of the underlying degradation mechanisms are still elusive, e.g., the γ′ (Ni3Al) phase depletion in superalloys, where a large amount of γ′ precipitates are dissolved in the γ matrix even though the incoming Al from coatings indeed increases the Al content. Here, we investigated the interdiffusion behavior between the Amdry365 coating and the IN792 superalloy at 1100 °C, using multiple microscopic techniques and thermodynamics calculations. Our results showed an excellent agreement between experiments and thermodynamics simulations, indicating the dominant role of Al on the initial diffusion-induced phase transitions. We proposed the Al-Cr interference effect to account for the pile-up behavior of Cr and the reduced Al content near the coating/superalloy interface. The local phase equilibrium calculations revealed that the γ′ depletion in the superalloy is primarily attributed to the loss of γ′-forming elements, such as Ta and Ti. Our findings opened up an avenue for studies on the superalloy/coating interdiffusion, contributing to reducing this damaging impact.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
Nyckelord
- Bond coating; Interdiffusion; Microstructural degradation; Thermodynamics
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Sun, Xiaoyu
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Li, Xiaolong
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Guo, Sheng
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Yu, Xin
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Zhu, Lilong
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Teng, Jianwei
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Jiang, Liang
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Moverare, Johan
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Li, Xin-Hai
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Peng, Ru Lin
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