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Modeling tolerance to irradiation embrittlement of reduced activation ODS steels by quantitative specification of nano-mezo structures

Research Project

Project/Area Number 18H01915
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 31010:Nuclear engineering-related
Research InstitutionKyoto University

Principal Investigator

Kimura Akihiko  京都大学, エネルギー理工学研究所, 研究員 (90195355)

Co-Investigator(Kenkyū-buntansha) 藪内 聖皓  京都大学, エネルギー理工学研究所, 助教 (70633460)
岩田 憲幸  久留米工業高等専門学校, 材料システム工学科, 准教授 (40397534)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2020: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2019: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
KeywordsODS鋼 / 酸化物粒子 / 耐照射性 / イオン照射 / 先進鉄鋼材料 / 酸化物分散強化 / 酸化物分散強化鋼 / 中性子照射 / 照射硬化 / 転位ループ / 溶接部 / 事故耐性燃料被覆管 / 相安定性 / 照射効果 / 耐照射脆化
Outline of Final Research Achievements

A quantitative evaluation method of radiation tolerance of ODS steels was developed on the bases of materials science of microstructure. Irradiation hardening and microstructure evolution in ion-irradiated three ODS steels were investigated by means of nano-indentation tests and high resolution transmission electron microscopy (HRTEM). The hardness test results indicated that the hardening depended on material, namely, the oxide particles of which the chemical compositions, size and number density were different. HRTEM revealed that there was a relationship between the amount of hardening and the interface structure between oxide particle and matrix. Moreover, it was shown that the amount of irradiation hardening can be correlated with the unit size of Moire pattern at the interface of oxide particle and matrix.Thus, the radiation tolerance of ODS steels can be quantitatively evaluated from TEM observation of oxides in the matrix of ODS steels.

Academic Significance and Societal Importance of the Research Achievements

酸化物分散強化(ODS)鋼は耐照射性に優れており、先進原子炉への適用が期待されているが、耐照射性の程度が包含されている酸化物粒子に依存するため、最適な酸化物粒子の開発が不可欠である。本研究では、ODS鋼の耐照射性を定量的に評価する手法を開発した。この結果、原子力材料開発における耐照射性の定量評価が可能になるとともに、将来期待されている安全性に優れ、かつ高効率な原子力発電システムに不可欠な革新的原子力材料の開発指針が明確になった。また、学術的には、耐照射性能発現機構に基づいた性能評価パラメータが変形を担う転位の運動に対する抵抗評価に応用できることを示唆している点が重要である。

Report

(3 results)
  • 2021 Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (17 results)

All 2020 2019 2018 Other

All Int'l Joint Research (2 results) Journal Article (6 results) (of which Peer Reviewed: 2 results) Presentation (9 results) (of which Invited: 2 results)

  • [Int'l Joint Research] Institute of Modern Physics, CAS/Chongqing University(中国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Korea Atomic Energy Agency(韓国)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Dose dependence of ion irradiation effects on 12Cr?6Al-ODS steel with electron-beam weld line2020

    • Author(s)
      Gao Jin、Yamasaki Yuuki、Song Peng、Huang Yen-Jui、Yabuuchi Kiyohiro、Kimura Akihiko、Sakamoto Kan、Yamashita Shinichiro
    • Journal Title

      Journal of Nuclear Materials

      Volume: 528 Pages: 151858-151858

    • DOI

      10.1016/j.jnucmat.2019.151858

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Transient liquid phase bonding of ODS ferritic steel with a physical vapor deposited boron thin layer2020

    • Author(s)
      Noh Sanghoon、Kimura Akihiko
    • Journal Title

      Journal of Nuclear Materials

      Volume: 529 Pages: 151888-151888

    • DOI

      10.1016/j.jnucmat.2019.151888

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Crystal and metal/oxide interface structures of nanoparticles in Fe?16Cr?0.1Ti?0.35Y2O3 ODS steel2019

    • Author(s)
      Dou Peng、Qiu Lanlan、Jiang Shaomin、Kimura Akihiko
    • Journal Title

      Journal of Nuclear Materials

      Volume: 523 Pages: 320-332

    • DOI

      10.1016/j.jnucmat.2019.05.015

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Morphology, crystal and metal/oxide interface structures of nanoparticles in Fe?15Cr?2W?0.5Ti?7Al?0.4Zr?0.5Y2O3 ODS steel2019

    • Author(s)
      Dou Peng、Sang Wei、Kimura Akihiko
    • Journal Title

      Journal of Nuclear Materials

      Volume: 523 Pages: 231-247

    • DOI

      10.1016/j.jnucmat.2019.05.055

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Effect of Cold Rolling on Recrystallization Behavior of Al-free and Al-added 15Cr-ODS Ferritic Steels2019

    • Author(s)
      Yoosung Ha, Akihiko Kimura
    • Journal Title

      Journal of Crystals

      Volume: 9

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ion-irradiation hardening accompanied by irradiation-induced dissolution of oxides in FeCr(Y, Ti)-ODS ferritic steel2018

    • Author(s)
      Peng Song, Jin Gao, Kiyohiro Yabuuchi, Akihiko Kimura
    • Journal Title

      Journal of Nuclear Materials

      Volume: 511 Pages: 200-211

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] Keys for radiation tolerance of ODS steels for advanced nuclear systems -- Phase stability under ion-irradiation--2019

    • Author(s)
      Akihiko Kimura, P. Song, J. Gao, Y.J. Huang, K. Yabuuchi, P. Dou
    • Organizer
      NEA International Workshop on Structural Materials for Innovative Nuclear Systems (SMINS-5)
    • Related Report
      2019 Annual Research Report
  • [Presentation] Neutron irradiation effects on EB-welded Fe-12Cr-6Al ODS steel2019

    • Author(s)
      Jin Gao, Kiyohiro Yabuuchi, Akihiko Kimura, Kan Sakamoto, Shinichiro Yamashita
    • Organizer
      NEA International Workshop on Structural Materials for Innovative Nuclear Systems (SMINS-5)
    • Related Report
      2019 Annual Research Report
  • [Presentation] Ion irradiation induced phase stability of three ODS ferritic steels strengthened by (Y, Ti), (Y, Al) and (Y, Zr) oxide particles2019

    • Author(s)
      Peng Song, Kiyohiro Yabuuchi and Akihiko Kimura
    • Organizer
      NEA International Workshop on Structural Materials for Innovative Nuclear Systems (SMINS-5)
    • Related Report
      2019 Annual Research Report
  • [Presentation] 次世代原子力材料FeCrAl-ODS鋼の研究開発2018

    • Author(s)
      木村晃彦
    • Organizer
      第65回放射線科学研究会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] “Cavity evolution and hardness change in a 15Cr-ODS ferritic steel under He-ion implantation & post-implantation annealing”,2018

    • Author(s)
      P. Song, K. Yabuuchi and A. Kimura,
    • Organizer
      第12回核融合エネルギー連合講演会,
    • Related Report
      2018 Annual Research Report
  • [Presentation] "Cavity evolution and hardness change in a 15Cr-ODS ferritic steel by He-ion implantation & post-implantation annealing",2018

    • Author(s)
      Peng SONG, Kiyohiro YABUUCHI, Akihiko KIMURA,
    • Organizer
      14th Japan-China Symposium on Materials for Advanced Energy Systems and Fission & Fusion Engineering (JCS-14),
    • Related Report
      2018 Annual Research Report
  • [Presentation] "Corrosion Properties of MA304LZ ODS Stainless Steel",2018

    • Author(s)
      Daniel Morrall, Huang Yen-Jui, Kiyohiro Yabuuchi, Akihiko Kimura, Takahiro Ishizaki, Yusaku Maruno,
    • Organizer
      14th Japan-China Symposium on Materials for Advanced Energy Systems and Fission & Fusion Engineering (JCS-14),
    • Related Report
      2018 Annual Research Report
  • [Presentation] “Phase stability of oxide particles under ion-irradiation in different sorts of ODS ferritic steels”,2018

    • Author(s)
      A. Kimura, P. Song, K. Yabuuchi,
    • Organizer
      The Nuclear Materials Conference D565 (NuMat 2018),
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] “Phase stability of a 14Cr-ODS ferritic steel strengthened by Y-Ti-O oxide particles under Fe ions irradiation at room temperature”,2018

    • Author(s)
      P. Song, A. Kimura, K. Yabuuchi,
    • Organizer
      The Nuclear Materials Conference D565 (NuMat 2018),
    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2023-01-30  

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