Impeding the γ′ depletion during the interdiffusion between bond coatings and superalloys via introduction of tantalum in bond coatings
The use of aluminiferous coatings profoundly improves the service life of superalloys but leads to microstructural degradation of superalloys and thus loss of mechanical properties. In this study, we modified MCrAlY coatings by adding Ta to reduce the interdiffusion effect on substrate alloys. This...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127523002071 |
| _version_ | 1827974730309697536 |
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| author | Xiaoyu Sun Pimin Zhang Johan Moverare Xin-Hai Li Luqing Cui Ru Lin Peng |
| author_facet | Xiaoyu Sun Pimin Zhang Johan Moverare Xin-Hai Li Luqing Cui Ru Lin Peng |
| author_sort | Xiaoyu Sun |
| collection | DOAJ |
| description | The use of aluminiferous coatings profoundly improves the service life of superalloys but leads to microstructural degradation of superalloys and thus loss of mechanical properties. In this study, we modified MCrAlY coatings by adding Ta to reduce the interdiffusion effect on substrate alloys. This strategy was verified by 2000 h/1100 °C oxidation tests in two Ta-containing MCrAlY-IN792 systems. The system with 3.3 wt% Ta MCrAlY exhibits an outstanding resistance to γ′ depletion in the substrate and comparable oxidation property in comparison with a reference system of Ta-free MCrAlY-IN792. Increasing Ta to 7.4 wt% results in reduced oxidation resistance. Thermodynamic simulations revealed the phase-transformation mechanism induced by initial interdiffusion, uncovering the cause of γ′ depletion in the substrate and the mechanism behind improving resistance to γ′ depletion by Ta addition. |
| first_indexed | 2024-04-09T19:59:04Z |
| format | Article |
| id | doaj.art-d291eabe5a79426cbed9ec2d3167b040 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-09T19:59:04Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-d291eabe5a79426cbed9ec2d3167b0402023-04-03T05:21:07ZengElsevierMaterials & Design0264-12752023-03-01227111792Impeding the γ′ depletion during the interdiffusion between bond coatings and superalloys via introduction of tantalum in bond coatingsXiaoyu Sun0Pimin Zhang1Johan Moverare2Xin-Hai Li3Luqing Cui4Ru Lin Peng5Department of Management and Engineering, Linköping University, SE-58183 Linköping, SwedenAlloyed-OxMet Technologies, OX5 1QU Oxford, England, United KingdomDepartment of Management and Engineering, Linköping University, SE-58183 Linköping, SwedenSiemens Energy AB, SE-61283 Finspång, SwedenSchool of Mechanical Engineering, Xi'an Jiaotong University, 710049, Xi'an, ChinaDepartment of Management and Engineering, Linköping University, SE-58183 Linköping, Sweden; Corresponding author.The use of aluminiferous coatings profoundly improves the service life of superalloys but leads to microstructural degradation of superalloys and thus loss of mechanical properties. In this study, we modified MCrAlY coatings by adding Ta to reduce the interdiffusion effect on substrate alloys. This strategy was verified by 2000 h/1100 °C oxidation tests in two Ta-containing MCrAlY-IN792 systems. The system with 3.3 wt% Ta MCrAlY exhibits an outstanding resistance to γ′ depletion in the substrate and comparable oxidation property in comparison with a reference system of Ta-free MCrAlY-IN792. Increasing Ta to 7.4 wt% results in reduced oxidation resistance. Thermodynamic simulations revealed the phase-transformation mechanism induced by initial interdiffusion, uncovering the cause of γ′ depletion in the substrate and the mechanism behind improving resistance to γ′ depletion by Ta addition.http://www.sciencedirect.com/science/article/pii/S0264127523002071Bonding coatingInterdiffusionMicrostructural degradationThermodynamics |
| spellingShingle | Xiaoyu Sun Pimin Zhang Johan Moverare Xin-Hai Li Luqing Cui Ru Lin Peng Impeding the γ′ depletion during the interdiffusion between bond coatings and superalloys via introduction of tantalum in bond coatings Materials & Design Bonding coating Interdiffusion Microstructural degradation Thermodynamics |
| title | Impeding the γ′ depletion during the interdiffusion between bond coatings and superalloys via introduction of tantalum in bond coatings |
| title_full | Impeding the γ′ depletion during the interdiffusion between bond coatings and superalloys via introduction of tantalum in bond coatings |
| title_fullStr | Impeding the γ′ depletion during the interdiffusion between bond coatings and superalloys via introduction of tantalum in bond coatings |
| title_full_unstemmed | Impeding the γ′ depletion during the interdiffusion between bond coatings and superalloys via introduction of tantalum in bond coatings |
| title_short | Impeding the γ′ depletion during the interdiffusion between bond coatings and superalloys via introduction of tantalum in bond coatings |
| title_sort | impeding the γ depletion during the interdiffusion between bond coatings and superalloys via introduction of tantalum in bond coatings |
| topic | Bonding coating Interdiffusion Microstructural degradation Thermodynamics |
| url | http://www.sciencedirect.com/science/article/pii/S0264127523002071 |
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