2020 Fiscal Year Research-status Report
Novel strengthening mechanisms of high-strength Ni-Fe-based superalloys
| Project/Area Number |
20K15057
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| Research Institution | Tohoku University |
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Principal Investigator |
孫 飛 東北大学, 材料科学高等研究所, 助教 (00836562)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | Ni-Fe-based superalloy / L12 ordered precipitate / Orowan mechanism / dislocation |
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| Outline of Annual Research Achievements |
After multiple attempts, Ni-Fe-based superalloys have been successfully prepared with different compositions and processed under various heat treatment conditions. The dominant strengthening precipitates, L12 ordered phases, can be observed in the fcc matrix with homogeneous distribution. At present, mechanical tests are in progress. The project is going smoothly based on the preliminary findings.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
1. Research experiences before proposing this research project are very important for making this effective initial research plans and have obtained current great results until now. 2. Research environment also plays great role for achieving these results and making the research go smoothly.
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| Strategy for Future Research Activity |
According to current results, mechanical tests are in progress. Microstructure analysis will be well performed by optical microscope, scanning electron microscope, transmission electron microscope and three‐dimensional atom probe. If possible, optimization of the composition and heat treatment will be carried out for getting better mechanical properties. Dominant strengthening mechanisms will be proposed. Simulation work will be also performed for guiding the experimental optimization.
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| Causes of Carryover |
After mechanical tests, microstructure analyze will be performed dominantly, which also need more test fees for analytical instruments. Also, depending on the achievement, presentation will be given at some conferences. So, partition fees and travel fees will be more than last fiscal year.
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