• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Microchemical Evolution in Alloys by Ion Irradiation and Fundamental Research for Creation of New Materials

Research Project

Project/Area Number 60420053
Research Category

Grant-in-Aid for General Scientific Research (A)

Allocation TypeSingle-year Grants
Research Field Nuclear engineering
Research InstitutionThe University of Tokyo

Principal Investigator

ISHINO Shiori  Faculty of Engineering, University of Tokyo, Professor, 工学部, 教授 (70010733)

Co-Investigator(Kenkyū-buntansha) SEKIMURA Naoto  Faculty of Engineering, University of Tokyo, Lecturer, 工学部, 講師 (10183055)
TAKAHASHI Naoaki  Faculty of Engineering, University of Tokyo, Research Associate, 工学部, 助手 (80010966)
IWATA Shuichi  Faculty of Engineering, University of Tokyo, Associate Professor, 工学部, 助教授 (50124665)
KAWANISHI Hiroshi  Faculty of Engineering, University of Tokyo, Research Associate, 工学部, 助手 (40010970)
Project Period (FY) 1985 – 1987
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥16,400,000 (Direct Cost: ¥16,400,000)
Fiscal Year 1987: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1986: ¥4,000,000 (Direct Cost: ¥4,000,000)
Fiscal Year 1985: ¥10,500,000 (Direct Cost: ¥10,500,000)
KeywordsIon Irradiation / Creation of New Materials / Radiation-enhanced segregation / Radiation-modified Phase Transformation / Radiation-enhanced Precipitation / Voids / 時効効果 / 析出物 / ミクロ組成変化
Research Abstract

Microchemical evolution in ion-irradiated alloys is analyzed by energy dispersive X-ray spectroscopy (EDS). Non-equilibrium segregation or depletion of alloying elements is observed in austenitic steels irradiated with heavy ions at elevated temperatures. Ni and Si are enriched around cavities and grain boundaries, while Cr, Mn and Mo are depleted there. These are explained by size factors of these elements. Ni-rich phases which are not seen in thermally controled material affect microstructural evolution during irradiation. MC precipitates in austenitic steels have strong stability during irradiation, while segregation of Ni and Si to their surface can modify the precipitates.
Microstructural and microchemical evolution in ion-irradiated alloys strongly depends on both energy and species of injected ions. For example, 400 HeV P^+ ion irradiation to austenitic steels produces iron-phosphide around the depth of ion range, and these precipitates supress void formation under irradiation.
Ion irradiation to precipitation-hardened ferritic steel promotes transition of martensitic phase to austenitic phase, which is not observed by thermal aging.
Non-equiliburium segregation and precipitation are found in various kinds of alloys during ion irradiation. Enormous data to control the creation of new materials by irradiation with energetic ions have been extracted from the present study.

Report

(4 results)
  • 1988 Final Research Report Summary
  • 1987 Annual Research Report
  • 1986 Annual Research Report
  • 1985 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] N.SEKIMURA.: Journal of Nuclear Materials. 133&134. 525-529 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] N.SEKIMURA.: Journal of Nuclear Materials. 141-143. 771-775 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] S.ISHINO.: Materials Science Forum. 15-18. 1105-1110 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] N.SEKIMURA.: Journal of Nuclear Materials. 155-157. (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] H.KAWANISHI.: Journal of Nuclear Materials. 155-157. (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] S.Iwata.: Journal of Nuclear Materials. 155-157. (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] N. SEKIMURA.: "Microchemical Evolution in PCA under Dual Ion Irradiation" Journal of Nuclear Materials. 133&134. 525-529 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] N. SEKIMURA.: "Precipitate Stability in Austenitic Stainless Steels During Heavy Ion Irradiation" Journal of Nuclear Materials. 141-143. 771-775 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] S. ISHINO.: "In-situ Observation of Cascade Clusters in Gold under Energetic Heavy Ion Irradiation" Materials Science Forum. 15-18. 1105-1110 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] N. SEKIMURA.: "Inhomogeneous Microstructural Evolution in Austenitic SteelsDuring Heavy Ion Irradiation" Journal of Nuclear Materials. 155-157. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] H. KAWANISHI.: "Precipitation Behavior in Austenitic and Ferritic Steels During Fast Neutron Irradiation and Thermal Aging" Journal of Nuclear Materials. 155-157. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] S.Ishino; N.Sekimura; T.Muroga: MATERIALS Science Forum. 15-18. 1105-1110 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] N.Sekimura; M.Taguchi; S.Ishino: Journal of Nuclear Materials.

    • Related Report
      1987 Annual Research Report
  • [Publications] K.Kawanishi; S.Ishino: Journal of Nuclear Materials.

    • Related Report
      1987 Annual Research Report
  • [Publications] K.Kawanishi; R.Hajima; N.Sekimura; Y.Arai; S.Ishino: Journal of Nuclear Materials.

    • Related Report
      1987 Annual Research Report
  • [Publications] N.Sekimura; S.Ishino: Journal of Nuclear Materials.

    • Related Report
      1987 Annual Research Report
  • [Publications] H.Kawanishi; S.Ishino: JOurnal of Nuclear Materils.

    • Related Report
      1987 Annual Research Report
  • [Publications] N.Sekimura;T.Zama;H.Kawanishi;S.Ishino: Journal of Nuclear Materials. 141-143. 771-775 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] S.Ishino;N.Sekimura;K.Hirooka;T.Muroga: Journal of Nuclear Materials. 141-143. 776-780 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] G.E.Lucas;T.Zama;S.Ishino: Journal of Nuclear Materials. 141-143. 799-803 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] H.Kawanishi;S.Ishino;E.Kuramoto: Journal of Nuclear Materials. 141-143. 899-902 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] H.Kawanishi;S.Ishino: Journal of Nuclear Materials. 141-143. 903-906 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] S.Ishino;N.Sekimura;T.Muroga: Materials Science Forum. 15-18. 1105-1110 (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] J.of Nuclear Materials. 133&134. (1985)

    • Related Report
      1985 Annual Research Report

URL: 

Published: 1987-03-31   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi