| Project/Area Number |
20K15057
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 26050:Material processing and microstructure control-related
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| Research Institution | Nagoya University (2022)
Tohoku University (2020-2021) |
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Principal Investigator |
Sun Fei 名古屋大学, 工学研究科, 特任講師 (00836562)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | Ni-Fe-based superalloy / L12 ordered precipitate / Orowan mechanism / Dislocation / dislocation / strengthening mechanism / precipitation behavior / Orowan looping |
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| Outline of Research at the Start |
This study focuses on novel strengthening mechanisms of high-strength Ni-Fe based superalloys. High content of Fe addition not only decreases the production cost, but still has better creep ruptured properties than some other Ni-based superalloys. The effect of Fe addition on the microstructure stability and deformation behaviors need to be studied. Compositions, heat treatment methods, precipitation behaviors, and interactions with dislocations could be controlled and investigated in combination with numerical simulations for better further understanding the strengthening mechanisms.
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| Outline of Final Research Achievements |
High content of Fe addition in Ni-Fe-based superalloys not only decreases the production cost but still has better mechanical properties than some other Ni-based superalloys. Related phycical prameters during the multi-Orowan looping process have been also studied. Ni-Fe-based superalloy has been optimized according to the well studied novel strengthening mechanisms and finally achieved better mechanical properteis.
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| Academic Significance and Societal Importance of the Research Achievements |
This Ni-Fe-based superalloy with low cost, good workabilities, great creep ruptured life has been considered as the promising candidate materials for hot section components in advanced ultra-supercritical power plants to improve electricity-producing efficiency, reduce CO2 emission and fuel cost.
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