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Study of SPF technique applied trasformation super plasicty on ferritic steel

Research Project

Project/Area Number 18K03585
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 14020:Nuclear fusion-related
Research InstitutionNational Institute for Fusion Science

Principal Investigator

Noto Hiroyuki  核融合科学研究所, ヘリカル研究部, 助教 (50733739)

Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords変態超塑性 / 低放射化フェライト鋼 / 金属加工 / 超塑性成形
Outline of Final Research Achievements

Reduced activation ferritic-martensitic (RAFM) steels have a critical issue of poor workability (low elongation and high yield strength). As an innovative means of processing RAFM, we have focused on “Transformation Super plasticity (SP)” in this study. In this theme, the effect of thermal cyclic heat treatments on the complex deformation by isostatic press was researched, implying the importance of “rate of thermal cycles”. In addition, the microstructural observations in view of “the strengthening particles” was also before and after Transformation Super plasticity. These results would contribute to the advanced metallurgical technology in target of transformation materials and the advanced metallography in mean of precipitation strengthening in the future.

Academic Significance and Societal Importance of the Research Achievements

本研究課題では、超塑性成形を専門とする企業と連携し研究を行うことにより、かなり簡易な手法によりSPF技術と熱サイクルを組み合わせた試験(複合変形のための内圧試験体の作成と試験方法)が可能であることが示された。このような成果により、本課題終了後に更なる発展が期待され、産学連携といった社会的意義を持つと考えている。また、変態超塑性後の組織を観察することにより、強化粒子の変化も観察された。このような結果は材料学的にも大きな意義を持つと考えている。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (2 results)

All 2022

All Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] MA-HIP法を⽤いた酸化物分散強化タングステンの開発2022

    • Author(s)
      能登裕之
    • Organizer
      第14回 核融合エネルギー連合講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Effect of ball diameter on Mechanical Alloying Process for the Production of Dispersion Strengthened Tungsten2022

    • Author(s)
      能登裕之
    • Organizer
      32nd Symposium on Fusion Technology
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2024-01-30  

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