| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
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| Outline of Final Research Achievements |
The effect of microstructure on the hot workability of Co-based superalloys, which are expected as new heat-resistant alloys, was investigated. We prepared samples in which different size of the γ' phase particles was precipitated for the hot compression. The smaller the γ' phase particles, the smaller the compressive load in Co-Al-W-based alloys, and the larger the γ' phase particles, the smaller the compressive load in Co-Al-W-Ni-Ti-Ta-B alloys. This suggests that the precipitation strengthening mechanism varies with the alloy system. The size of the residual γ' phase particles after compression was became significantly larger. This suggest that the γ' phase particles grow during the forging process. It is also clear that the γ' phase particles became incoherent with the matrix phase.
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