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Irradiation effects on the performance of the alumina scale formed in FeCrAl ODS ferritic steels

Research Project

Project/Area Number 19K21029
Project/Area Number (Other) 18H05839 (2018)
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund (2019)
Single-year Grants (2018)
Review Section 0202:Condensed matter physics, plasma science, nuclear engineering, earth resources engineering, energy engineering, and related fields
Research InstitutionTohoku University

Principal Investigator

Yu Hao  東北大学, 金属材料研究所, 助教 (10825871)

Project Period (FY) 2018-08-24 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsODS / oxidation / alumina / microstructure / irradiation / alumina scale / nuclear materials / FeCrAl ferritic steels / ODS alloys / Oxidation / Irradiation effect / Microstructure
Outline of Research at the Start

The research is aimed to investigate the irradiation effect on the alumina-forming FeCrAl oxide dispersion-strengthened ferritic steels. Based on this work, the compositions of FeCrAl ODS alloys will be optimized to develop a reliable alumina film during irradiation environments.

Outline of Final Research Achievements

In order to develop a robust alumina scale dispersed with nano-oxide particles for ODS FeCrAl ferritic alloys, the oxidation behavior of FeCrAl ODS ferritic alloys with zirconium and Ex. O additions was investigated at 900 oC, 1000 oC and 1100 oC in air. Microstructure characterization focused on the distribution of Y-Zr oxide particles inside alumina scales was conducted. By adjusting the contents of Zr and Ex. O additions, a distribution with dense Y-Zr oxide particles inside the alumina scale was obtained, which is expected to enhance the stability of the alumina scale during service at elevated temperatures in nuclear applications. A heavy Fe-ion simulation bombardment technique was conducted for the irradiation-processing of pre-oxidized alloys with alumina scales formation. High stability of the Y-Zr oxide particles dispersed alumina scales was confirmed during irradiation.

Academic Significance and Societal Importance of the Research Achievements

本研究では、酸化物分散強化フェライト鋼に形成されたアルミナ酸化皮膜の組織、及び剥離挙動・耐酸化性に及ぼす照射効果を調べた。本成果は、将来の高温原子炉で使用されるアルミナスケール形成ODS超合金の設計・開発のための貴重な情報となりうる。

Report

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

    (8 results)

All 2020 2019 2018

All Presentation (8 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] Effect of excessive oxygen addition on the oxidation behavior of Zr-added FeCrAl ODS ferritic steels2020

    • Author(s)
      Hao Yu, Sosuke Kondo, Ryuta Kasada, Shigeharu Ukai
    • Organizer
      日本原子力学会東北支部第43回研究交流会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Evaluation of excessive oxygen effect on the oxidation resistance of Zr-added FeCrAl ODS ferritic steels at 900oC to 1100oC2020

    • Author(s)
      Hao Yu, Sosuke Kondo, Ryuta Kasada, Shigeharu Ukai
    • Organizer
      材料照射研究会「Irradiation 3.0に向けて」
    • Related Report
      2019 Annual Research Report
  • [Presentation] Effect of Excessive Oxygen Contents on the Oxidation Behavior of Zr-added FeCrAl ODS Ferritic Steels at 900oC-1100oC2020

    • Author(s)
      Hao Yu, Sosuke Kondo, Ryuta Kasada, Naoko H. Oono, Shigenari Hayashi, Shigeharu Ukai
    • Organizer
      日本金属学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Characterization of Zr and/or excessive oxygen effect on high-temperature oxidation performance of alumina-forming FeCrAl ODS ferritic steels2019

    • Author(s)
      Hao YU, Ryuta KASADA, Sosuke KONDO, Yoshitaka MATSUKAWA, Shigeharu UKAI, Shigenari HAYASHI, Naoko OONO
    • Organizer
      NEA International Workshop on Structural Materials for Innovative Nuclear Systems (SMINS-5)
    • Related Report
      2019 Annual Research Report
  • [Presentation] Influence of excessive oxygen addition on the oxidation resistance of Zr-added FeCrAl ODS ferritic steels2019

    • Author(s)
      Hao Yu, Sosuke Kondo, Ryuta Kasada, Naoko Oono, Shigenari Hayashi, Shigeharu Ukai
    • Organizer
      19th International Conference on Fusion Reactor Materials (ICFRM-19)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of Zr Addition and the Excessive Oxygen on the Oxidation Behavior of FeCrAl ODS Superalloys in Air2019

    • Author(s)
      Hao Yu, Ryuta Kasada, Sosuke Kondo, Yoshitaka Matsukawa, Shigeharu Ukai, Shigenari Hayashi, Naoko Oono
    • Organizer
      日本金属学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Development of Co-based Oxide Dispersion Strengthened Superalloys2018

    • Author(s)
      Hao Yu, Shigeharu Ukai, Naoko Oono, Sosuke Kondo, Ryuta Kasada
    • Organizer
      14th Japan-China Symposium on Materials for Advanced Energy Systems and Fission & Fusion Engineering(JCS-14)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of Y2O3 addition on the high-temperature oxidation resistance of Co-20Cr-10Al ODS superalloys2018

    • Author(s)
      Hao Yu, Shigeharu Ukai, Naoko Oono, Sosuke Kondo, Ryuta Kasada
    • Organizer
      第135回東北大学金属材料研究所講演会
    • Related Report
      2018 Annual Research Report

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Published: 2018-08-27   Modified: 2024-03-26  

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