| Project/Area Number |
15K14163
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Structural/Functional materials
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 動的フェライト変態 / 加工熱処理 / 中性子回折 / 炭素分配挙動 / 中性子線回折 |
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| Outline of Final Research Achievements |
Thermomechanical processing that involves precisely controlled deformation and heat treatment at elevated temperature has been practically used to obtain fine-grained ferrite structures. Nowadays, a new concept of process utilizing dynamic ferrite transformation has been received much attention because ultrafine-grained structure with a mean grain size of approximately 1 um can be achieved. The present study investigated partitioning behavior, transformation kinetics, and change in lattice defects during dynamic ferrite transformation by in-situ neutron diffraction analysis. The results suggest that partitioning behavior of alloying elements changes from para- to ortho-equilibrium with the progress of dynamic ferrite transformation.
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