| 研究課題/領域番号 |
20K14445
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| 研究機関 | 核融合科学研究所 |
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研究代表者 |
申 晶潔 核融合科学研究所, ヘリカル研究部, 助教 (80824747)
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| 研究期間 (年度) |
2020-04-01 – 2023-03-31
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| キーワード | 12Cr ODS steel / Recrystallization / Tensile properties / Microstructure / Oxide particles |
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| 研究実績の概要 |
In fiscal year 2020, recrystallization of 12Cr ODS steel was achieved by the new thermomechanical process, namely, multi-directional cold rolling with a thickness reduction of 90% and subsequent annealing at 1000 ℃ and 1100 ℃. It was found that both size and number density of oxide particles were not obviously changed after annealing. Tensile tests in the temperature range between room temperature and 700 ℃ were carried out. In addition, dog-bone shape tensile specimens and 0.2 mm thick disks with a diameter of 3 mm were prepared for neutron irradiation at Belgian Reactor 2 (BR2) via collaborative research with Oarai Center, Institute for Materials Research, Tohoku University.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
As the proposed schedule of this study, microstructure of recrystallized 12Cr ODS steel was characterized, and tensile properties in the range of room temperature - 700 ℃ were evaluated in FY 2020. Specimens for the creep test are preparing. Creep test machines need maintenance and machine time will be arranged for the recrystallized specimens.
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| 今後の研究の推進方策 |
Based on the schedule of this study, creep properties of recrystallized specimens are planned to be evaluated. Regarding the creep test, it is time-consuming, and creep test machines inevitably need a lot of maintenance. Moreover, in order to investigate the irradiation resistance and the stability of oxide particles under irradiation, high energy ion irradiation experiments at both room temperature and high temperatures will be performed via joint usage/research with other universities and/or institutes.
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| 次年度使用額が生じた理由 |
Some specimens were made using other budget before this budget came. Tensile test holder was not necessary to change in this fiscal year. Besides, due to the COVID-19 pandemic, the domestic and international conferences were held online so that the registration fee became cheaper and there was no need for travel expenses.
This amount of budget would be used in the next fiscal year for machining specimens and ion irradiation experiments.
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