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Interaction of helium with irradiation defects in metals

Research Project

Project/Area Number 03402053
Research Category

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

Allocation TypeSingle-year Grants
Research Field Nuclear engineering
Research InstitutionInstitute for materials research.Tohoku University

Principal Investigator

MATSUI Hideki  Institute for Materials Rcascarch, Professor, 金属材料研究所, 教授 (50005980)

矢野 信三 (1993)  東北大学, 金属材料研究所, 助手 (60005915)

Co-Investigator(Kenkyū-buntansha) YANO Shinzo  Institute for Materials Research, Research Associate, 金属材料研究所, 助手 (60005915)
MINONISHI Yasuhide  Institute for Materials Research, Research Associate, 金属材料研究所, 助手 (70005958)
KIMURA Akihiko  Institute for Materials Research, Associate Professor, 金属材料研究所, 助教授 (90195355)
中嶋 英雄  東北大学, 金属材料研究所, 助教授 (30134042)
Project Period (FY) 1991 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥39,800,000 (Direct Cost: ¥39,800,000)
Fiscal Year 1993: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1992: ¥7,900,000 (Direct Cost: ¥7,900,000)
Fiscal Year 1991: ¥29,100,000 (Direct Cost: ¥29,100,000)
KeywordsFusion reactor materials / helium effects / thermal helium desorption / vanadium alloys / ferritc steels / irradiation defects / バナジウム合金 / ヘリウム脆性 / 照射効果 / トリチウムトリック
Research Abstract

A coherent picture on the interaction of helium with irradiation defects has been established as a result of the present project : When displacement damage is significantly less than the amount of helium introduced, the fraction of interstitial helium is large and they diffuse very rapidly. Accumulation of helium to grain boundaries is high in this case leading to intergranular embrittlement. This situation is most pronounced for tritium trick technique and cyclotron implantation follows. When speciments doped with helium using tritium trick technique are irradiated with neutrons, helium is trapped mainly by irradiation-induced vacancies and helium transport to grain boundaries is suppressed and embrittlement is mitigated. Under DHCE condition where displacement damage is introduced concurrently with helium generation, helium generated is immediately trapped by vacancies and helium embrittlement has been found significantly reduced. Since this situation is quite similar to fusion environment, this finding leads to a very important conclusion that helium embrittlement may not be so significant as has been anticipated.
A clear correlation of the interaction between solute atoms and helium with solute atomic size factor became evident. Namely, strongly undersized solutes, e.g.iron and chromium, traps helium strongly and suppress their diffusion. This finding was obtained from TEM and THDS experiments on speciments helium-injected with an energy under displacement thershold energy. This kind of property of undersized solutes may be effective in suppressing helium embrittlement at high temperatures.

Report

(4 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • 1991 Annual Research Report
  • Research Products

    (45 results)

All Other

All Publications (45 results)

  • [Publications] H.Matsui,: "Large Swelling Observed in a V-5%Fe Alloy After Irradiation in FFTF," ASTM STP. 1125. 928-941 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Matsui,: "Embrittlement of vanadium alloys doped with helium," J.Nucl.Mater.191-194. 919-923 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Nakajima,: "Effects of Solute Addition on Swelling of Vanadium after FFTF Irradiation" J.Nucl.Mater.191-194. 952-955 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.Satou,: "Neutron irradiation damage of helium charged V-Ti-Cr-Si type alloys," J.Nucl.Mater.191-194. 938-941 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.Tanaka,: "Effects of implanted helium on the mechanical properties of vanadium-based binary alloys" Mater.Trans.JIM.34. 1083-1089 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Matsui,: "Mechanical properties of vanadium alloys doped with helium using various techniques" ASTM STP. 1175. 1215-1227 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Matsui,: "Effects of temperature history during neutron irradiation on the microstructure of vanadium alloys," J.Nucl.Mater.212-215. 784-789 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] K.Kuji,: "Microstruchure of vanadium alloys after irradiation at 700C" SCI.REP.RITU.A-40. 21-124 (994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Matsui,: "R&D of Vanadium Alloys for Fusion in Japan" “Materials for Advanced Energy Systems. 271-276 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] D.L.Smith,: "Development of vanadium-base alloys for fusion first-wall-blanket applications," Fusion Eng.Des.29. 399-410 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Matsui,: "Development of triple fission technique for simulating fusion neutron irradiation" J.Nucl.Mater.1561. 233-237 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Matsui,: "Progress Radiation Effect Studies of Low Activation Vanadium Alloys" Proc.Sixteenth IAEA Fusion Energy Conference,. 3. 507-515 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.Kimura,: "Irradiation hardening of reduced activation martensitic steels" J.Nucl.Mater,. 270. 233-237 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] D.L.Smith,: "Experimental Method for Investigating Helium Effects in Irradiated Vanadium," J.Nucl.Mater.155-157. 1359-1363 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Matsui: "Large Swelling Observed in a V-5%Fe Alloy After Irradiation in FFTF" ASTM STP. 1125. 928-941 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Matsui: "Embrittlement of vanadium alloys doped with helium" J.Nucl.Mater. 191-194. 919-923 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Nakajima: "Effects of Solute Addition on Swelling of Vanadium after FFTF Irradiation" J.Nucl.Mater. 191-194. 952-955 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.Satou: "Neutron irradiation damage of helium charged V-Ti-Cr-Si type alloys" J.Nucl.Mater. 191-194. 938-941 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.Tanaka: "Effects of implanted helium on the mechanical properties of vanadium-based binary alloys" Mater.Trans.JIM.34. 1083-1089 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Matsui: "Mechanical properties of vanadium alloys doped with helium using various techniques" ASTM STP. 1175. 1215-1227 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Matsui: "Effects of temperature history during neutron irradiation on the microstructure of vanadium alloys" J.Nucl.Mater. 212-215. 784-789 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] K.Kuji: "Microstructure of vanadium alloys after irradiation at 700 C" SCI.REP.RITU. A-40. 121-124 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Matsui: "R & D of Vanadium Alloys for Fusion in Japan" "Materials for Advanced Energy Systems and Fission and Fusion Engineering" (2) Eds.A.Kohyama, et al.271-276 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] D.L.Smith: "Development of vanadium-base alloys for fusion first-wall-blanket applications" Fusion Eng.Des. 29. 399-410 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Matsui: "Development of triple fission technique for simulating fusion neutron irradiation" J.Nucl.Mater.1561. 233-237 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Matsui: "Progress in Radiation Effect Studies of Low Activation Vanadium Alloys" Proc.Sixteenth IAEA Fusion Energy Conference, Montreal, Canada. 507-515 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.Kimura: "Irradiation hardening of reduced activation martensitic steels" J.Nucl.Mater. 270. 233-237 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] D.L.Smith: "Experimental Method for Investigating Helium Effects in Irradiated Vanadium" J.Nucl.Mater. 155-157. 1359-1363 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.Kimura: "Designation of alloy composition of low activation martensitic steel." J.Nucl.Mater.(in press). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] H.Takahashi: "Mechanical properties of neutron-irradiated low activation Fe-Cr-Nn alloys." J.Nucl.Mater.(in press). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] S.Jitsukawa: "Elastic-plastic fracture toughness of solution annealed JPCA using miniaturized RCT specimens irradiated in the HFIR to 3 dpa." J.Nucl.Mater.(in press). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] K.Abe: "Tensile proporties and microstructures of neutron irradiated V-Ti-Cr-Si type alloys." J.Nucl.Mater.(in press). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] J.Nagakawa: "Calculation of radiation induced stress relaxation in the experimental fusion reactors." J.Nucl.Mater.(in press). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Tanabe: "Neutron induced luminescence of ceramics." J.Nucl.Mater.(in press). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] H.Matsui: "Effects of Solute Atomic Size Factor on the Swelling of Vanadium Alloys" 16th Intemational Symposium on the Effects of Radiation Materials,ASTM STP 1993,in press.

    • Related Report
      1992 Annual Research Report
  • [Publications] H.Matsui: "Mechanical Properties of Vanadium Alloys Doped with Helium Using Various Techniques" 16th International Symposium on the Effects of Radiation on Materials,ASTM STP 1993,in press.

    • Related Report
      1992 Annual Research Report
  • [Publications] M,Satou: "Neutron Irradiation Damage of Helium-Charged V-Ti-Cr-Si-type Alloys" Journal of Nuclear Materials. 191-194. 938-941 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] H.Nakajima: "Effect Solute Addition on Swelling of Vanadium after FFTF Irradiation" Journal of Nuclear Materials. 191-194. 952-955 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] MATSUI,Hideki: "Large swelling observed in a Vー5at.%Fe alloy after irradiation in FFTF" ASTM STP 1125. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] MATSUI,Hideki: "Embrittlement of vanadium alloys doped with helium" J.Nucl.Mater.(1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] MATSUI,Hideki: "Microstructural evolution in Vー5%Fe alloy by fast neutron irradiation" J.Nucl.Mater.(1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Nakajima,Hideo: "Effects of solute addition on swelling of vanadium after FFTF irradiation" J.Nucl.Mater.(1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] MATSUI,Hideki: "Microstructural evolution in vanadium alloys by fast neutron irradiation" J.Nucl.Mater.(1993)

    • Related Report
      1991 Annual Research Report
  • [Publications] MATSUI,Hideki: "Mechanical properties of vanadium alloys doped with helium using various techniques" ASTM STP. (1993)

    • Related Report
      1991 Annual Research Report
  • [Publications] MATSUI,Hideki: "Effects of solute atomic size factor on the swelling of vanadium alloys" ASTM STP. (1993)

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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