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Search and Control of self-healing mechanism in fusion reactor materials

Research Project

Project/Area Number 09308015
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Nuclear fusion studies
Research InstitutionTohoku University

Principal Investigator

MATSUI Hideki  Institute of Materials Research, Tohoku University, Professor, 金属材料研究所, 教授 (50005980)

Co-Investigator(Kenkyū-buntansha) FUKUMOTO Ken-ichi  Institute of Materials Research, Tohoku University, Res. Associate, 金属材料研究所, 助手 (30261506)
YANO Shinzo  Institute of Materials Research, Tohoku University, Res. Associate, 金属材料研究所, 助手 (60005915)
YAMAMOTO Takuya  Institute of Materials Research, Tohoku University, Assistant Professor, 金属材料研究所, 講師 (50212296)
Project Period (FY) 1997 – 2000
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥35,000,000 (Direct Cost: ¥35,000,000)
Fiscal Year 2000: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1999: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1998: ¥6,800,000 (Direct Cost: ¥6,800,000)
Fiscal Year 1997: ¥25,500,000 (Direct Cost: ¥25,500,000)
Keywordsfusion reactor materials / ion irradiation / vanadium alloys / radiation effects / embrittlement / swelling / dislocation loop / フェライト鋼 / ヘリウム / 格子欠陥 / ボイドスウェリング
Research Abstract

Self-healing property under particle irradiation is not uncommon to solid materials; many of the engineering materials keep their original shape even after several tens dpa, and this is exactly the result of self-healing property of the material. In this research, this intrinsic property, as well as extrinsic self-healing property given to these materials by adding precipitates, etc. is studied.
Firstly, vanadium alloys that have been known to exhibit swelling decrease after going over a peak swelling at some intermediate dpa value. Precipitates in these materials have been examined closely, identifying their nature by utilizing selected area diffraction taken with imaging plates, EDS and PEELS. It became clear that interface between these precipitates and the matrix act as trapping sites, where interface-catalyzed recombination occurs, and play an important role in suppressing swelling. However, this phenomenon only cannot explain the observed decrease in swelling while dpa increases m … More onotonically. Increase in the precipitate density with dpa, caused by irradiation induced precipitation appears to be the mechanism explaining the decrease in swelling. Thus, it seems very important to give these precipitates good stability even after prolonged irradiation to high doses.
One of the good example of self-healing property demonstrated under high dpa irradiation is the one observed in V-5Ti alloy. In this experiment, the specimen was first irradiated up to 17dpa in FFTF/MOTA. The specimen was further irradiated in JMTR up to 0.1dpa, which is much smaller to the irradiation in FFTF. The microstructure after 17dpa in FFTF/MOTA was indistinguishable to those in the specimen irradiated to 0.1dpa in JMTR. The microstructure basically consisted of tiny TiO2 precipitates. This means that this microstructure had been saturated below 0.1dpa and did not evolve even during the prolonged irradiation up to 17dpa. This observation is the result of remarkable self-healing mechanism due to the microstructure consisting of fine precipitates; the interface between the matrix and the precipitates act as catalysis for mutual recombination between self-interstitial atoms and vacancies.
Computer code based on chemical rate theory has been developed in order to analyze the self-healing property observed experimentally. The input parameters have been obtained by using HVEM in situ irradiation technique. The result of the simulation was in good qualitative agreement while quantitative agreement was fair. The reason for this insufficient agreement between the theory and the experiment may partly be because of the insufficient approximation adopted in the theory. It is believed other mechanism is responsible for this and will be the topic of further research. Less

Report

(5 results)
  • 2001 Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (59 results)

All Other

All Publications (59 results)

  • [Publications] H.Matsui: "Blanket design using FliBe in helical-type fusion reactor FFHR"J. Nucl. Mater. 248. 147-152 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Research and development on vanadium alloys for fusion applications"J. Nucl. Mater. 258-263. 205-214 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Enhauncement of irradiation hardening by nickel addition in the raduced-activation 9Cr-2W martensitic steel"J. Nucl. Mater. 258-263. 1199-1203 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Dependence of impact properties on irradiation temperature in reduced-activation martenstic steels"J. Nucl. Mater. 258-263. 1340-1344 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Swelling behavior of V-Fe binary and V-Fe-Ti ternary alloys"J. Nucl. Mater. 258-263. 1431-1436 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Irradiation creep of vanadium-base alloys"J. Nucl. Mater. 258-263. 1471-1475 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Materials design and related R&D issues for the force-free helical reactor (FFHR)"J. Nucl. Mater. 258-263. 2079-2082 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Microstructual evolution and hardening of neutron irradiated vanadium alloys at low temperatures in Japan Material Testing Reactor"J. Nucl. Mater. 271&272. 301-305 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Physical mechanisms of helium release during deformation of vanadium alloys doped with helium atoms"J. Nucl. Mater. 271&272. 356-359 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Effects of varying temperature irradiation on the neutron irradiation hardening of reduced-activation 9Cr-2W martensitic steels"J. Nucl. Mater. 271&272. 360-364 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Effect of temperature change on microstructural evolution of vanadium alloys under neutron irradiation in JMTR"J. Nucl. Mater. 271&272. 365-369 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Microstructural evolution in vanadium irradiated during ion irradiation at constant and varying temperature"J. Nucl. Mater. 271&272. 376-380 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Modeling of the cyclic ball indentation test for small specimens using the finite element method"J. Nucl. Mater. 271&272. 440-444 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Study of point defect behaviors in vanadium and its alloys by using HVEM"J. Nucl. Mater. 283-287. 234-238 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Effects of temperature change on the microstructural evolution of vanadium alloys under ion irradiation"J. Nucl. Mater. 283-287. 291-296 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Mechanical behavior and microstructural evolution of vanadium alloys irradiated in ATR-A1"J. Nucl. Mater. 283-287. 492-497 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Radiation-induced precipitation in V-(Cr, Fe)-Ti alloys irradiated at low temperature with dose during neutron or ion irradiation"J. Nucl. Mater. 283-287. 535-539 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Confocal microscopy-fracture reconstruction and finite element modeling characterization of local cleavage toughness in a ferritic/martensitic steel in subsized Charpy V-notch impact tests"J. Nucl. Mater. 283-287. 992-996 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Blanket desingn using FliBe in helical-type fusion reactor FFHR"J. Nucl. Mater.. 248. 147-152 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Research and development on vanadium alloys for fusion applications"J. Nucl. Mater.. 258-263. 205-214 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Enhauncement of irradiation hardening by Nickel addition in the reduced-activation 9Cr-2W martensitic steel"J. Nucl. Mater.. 258-263. 1199-1203 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Dependence of impact properties on irradiation Temperature in reduced-activation martenstic steels"J. Nucl. Mater.. 258-263. 1340-1344 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Swelling behavior of V-Fe binary and V-Fe-Ti ternary alloys"J. Nucl. Mater.. 258-263. 1431-1436 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Irradiation creep of vanadium-base alloys"J. Nucl. Mater.. 258-263. 1471-1475 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Materials design and related R&D issues for the Force-free helical reactor (FFHR)"J. Nucl. Mater.. 258-263. 2079-2082 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Microstructual evolution and hardening of neutron irradiated vanadium alloys at low temperatures in Japan Materials Testing Reactor"J. Nucl. Mater.. 271&272. 301-305 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Physical mechanisms of helium release during deformation of vanadium alloys doped with helium atoms"J. Nucl. Mater.. 271&272. 356-359 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Effects of varying temperature irradiation on the neutron irradiation hardening of reduced-activation 9Cr-2W martensitic Steels"J. Nucl. Mater.. 271&272. 360-364 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Effect of temperature change on microstructural evolution of vanadium alloys under neutron irradiation in JMTR"J. Nucl. Mater.. 271&272. 365-369 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Microstructural evolution in vanadium irradiated during ion irradiation at constant and varying temperature"J. Nucl. Mater.. 271&272. 376-380 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Modeling of the cyclic ball indentation test for small specimens using the finite element method"J. Nucl. Mater.. 271&272. 440-444 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Study of point defect behaviors in vanadium and its alloys by using HVEM"J. Nucl. Mater.. 283-287. 234-238 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Effects of temperature change on the microstructural evolution of vanadium alloys under ion irradiation"J. Nucl. Mater.. 283-287. 291-296 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Mechanical behavior and microstructural evolution of vanadium alloys irradiated in ATR-A1"J. Nucl. Mater.. 283-287. 492-497 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Radiation-induced precipitation in V-(Cr,Fe)-Ti alloys irradiated at low temperature with dose during neutron or ion Irradiation"J. Nucl. Mater.. 283-287. 535-539 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Matsui et al.: "Confocal microscopy-fracture reconstruction and finite element modeling characterization of local cleavage toughness in a ferritic/martensitic steel in subsized Charpy V-noch impact tests"J. Nucl. Mater.. 283-287. 992-996 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Matsui: "Mechanical behavior and microstructural evolution of vanadium alloys irradiated in ATR-A1"J.Nucl.Mater.. 283-287. 492-497 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Matsui: "Radiation-induced precipitation in V-(Cr,Fe)-Ti alloys irradiated at low temperature with dose during neutron or ion irradiation"J.Nucl.Mater.. 283-287. 535-539 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Matsui: "Effects of temperature change on the microstructural evolution of vanadium alloys under ion irradiation"J.Nucl.Mater.. 283-287. 291-296 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Matsui: "Study of point defect behaviors in vanadium and its alloys by using HVEM"J.Nucl.Mater.. 283-287. 234-238 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Matsui: "Confocal microscopy-fracture reconstruction and finite element modeling characterization of local cleavage toughness in a ferritic/martensitic steel in subsized Charpy V-notch impact tests"J.Nucl.Mater.. 283-287. 992-996 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Matsui: "Microstructual evolution and hardening of neutron irradiated vanadium alloys at low temperatures in Japan Material Testing Reactor"J. Nucl. Mater. 271&272. 301-305 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] H.Matsui: "Effects of varying temperature irradiation of the neutron irradiation hardening of reduced-activation 9Cr-2W martensitic steels"J. Nucl. Mater. 271&272. 360-364 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] H.Matsui: "Effects of temperature change on microstructural evolution of vanadium alloys under neutron irradiation in JMTR"J. Nucl. Mater. 271&272. 365-369 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] H.Matsui: "Microstructural evolution in vanadium irradiated during ion irradiation at constant and varying temperature"J. Nucl. Mater. 271&272. 376-380 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] H.Matsui: "Physical mechanisms of helium release during deformation of vanadium alloys doped with helium atoms"J. Nucl. Mater. 271&272. 356-359 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] H.Matsui: "Modeling of the cyclic ball indentation test for small specimens using the finite element method"J. Nucl. Mater. 271&272. 440-444 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Fukumoto,K.: "Swelling behavior of V-Fe binary and V-Fe-Ti ternary alloys" J.Nucl.Master. 258-263. 1431-1436 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Kasada,R.: "Enhance ment of irradiation hardening by nickel addition in the raduced-activation 9Cr-2W martensitic steel" J.Nucl.Master. 258-263. 1199-1203 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Kimura,A.: "Dependence of impact properties on irradiation temperature in reduced-activation martenstic steels" J.Nucl.Master. 258-263. 1340-1344 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Sagara,A.: "Materials design and related R&D issues for the force-free helical reactor (FFHR)" J.Nucl.Master. 258-263. 2079-2082 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Tsai,H.: "Irradiation creep of vanadium-base alloys" J.Nucl.Master. 258-263. 1471-1475 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Zinkle,S.J.: "Research and development on vanadium alloys for fusion applications" J.Nucl.Master. 258-263. 205-214 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] H.Matsui: "Research and development on vanadium alloys for fusion applications." J.Nucl.Mater.(in print).

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Matsui: "Swelling behavior of V-Fe binary and V-Fe-Ti ternary alloys." J.Nucl.Mater.(in print).

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Matsui: "Anomalous irradiation hardening in the nickel added reduced activation 9Cr-2W martensitic steel." J.Nucl.Mater.(in print).

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Matsui: "Hydrogen effects on charpy-impact properties of V-4Cr-4Ti alloy." J.Nucl.Mater.(in print).

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Matsui: "Effect of dynamically charged helium on microstructure of vanadium binary alloys under neutron irradiation." J.Nucl.Mater.(in print).

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Matsui: "Irradiation creep of vanadium alloys." J.Nucl.Mater.(in print).

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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