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A New Alloy Design Method utilizing Diffusion Induced Recrystallization

Research Project

Project/Area Number 06650721
Research Category

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

Allocation TypeSingle-year Grants
Research Field Physical properties of metals
Research InstitutionTokyo Institute of Technology

Principal Investigator

KAJIHARA Masanori  Tokyo Institute of Technology, Department of Materials Science and Engineering, Associate Professor, 大学院・総合理工学研究科, 助教授 (10161035)

Co-Investigator(Kenkyū-buntansha) KATO Masaharu  Tokyo Institute of Technology, Department of Materials Science and Engineering,, 大学院・総合理工学研究科, 教授 (50161120)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1995: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1994: ¥1,700,000 (Direct Cost: ¥1,700,000)
KeywordsDiffusion Induced Recrystallization / Diffusion Controlled Grain Boundary Migration / Fe-Cu Binary System / Dissolution Reaction / Interdiffusion
Research Abstract

Diffusion induced recrystallization (DIR) in the Fe (Cu) system was experimentally studied using Cu/ (Fe-4.8Cu) /Cu diffusion couples in order to develop a new alloy design method based on a fast diffusion phenomenon duc to DIR.Cu/ (Fe-4.8Cu) /Cu diffusion couples, which consist of pure copper single crystals and an Fe-4.8Cu polycrystalline specimen, were anecaled at 1323K for various times between 300 and 86400s. At this annealing temperature, DIR occurs in the Fe-Cu phase from the interface of the diffusion couple and grows with increasing annealing time according to the relation l=1.6 (t/t_0) ^<0.29>, where l is the thickness of the DIR region in mum, t the annealing time in s and t_0 the unit time (1s). On the other hand, the thickness w of the Fe-Cu phase decreases with increasing annealing time according to the relation w/w_0=1-5.0*10^<-5>* (t/t_0) ^<0.5>, where w_0 stands for the initial thickness of the Fe-Cu phase. Thus, the Fe-Cu phase will be completely occupied with DIR regions at an annealing time of 56h.
The observations were numerically analyzed utilizing a energy balance model proposed by one of the present authors. This model gives a quantitative relationship between the driving force for DIR and the migration rate of the moving grain boundary. For the analysis, the grain boundary diffusion of copper along the grain boundaries of DIR regions is the rate controlling process and the Fe-Cu phase is thermodynamically ideal. The equation l=1.04 (t/t_0) ^<1/3> has been obtained to describe the kinetics of DIR in the Fe-Cu phase under the present experimental conditions. The analysis quantitatively accounts for the observations.

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 吉田慎,竹内信貴,川波靖彦,梶原正憲,森勉: "Cu/Fe/Cu拡散対のFe相における拡散誘起再結晶の組織観察" 材料とプロセス. 8. 1382 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 川波靖彦,梶原正憲,森勉: "Cu/Fe/Cu拡散対のFe相における拡散誘起再結晶の速度論的解析" 材料とプロセス. 8. 1383 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Yoshida, N.Takeuchi, Y.Kawanami, M.Kajihara and T.Mori: "Microstructure of Diffusion Induced Recrystallization in Fe Phase of Cu/Fe/Cu Diffusion Couples" Current Advances in Materials and Processes, ISIJ. 8. 1382 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Kawanami, M.Kajihara and T.Mori: "Analysis of Kinetics of Diffusion Induced Recrystallization in Fe Phase of Cu/Fe/Cu Diffusion Couples" Current Advances in Materials and Processes, ISIJ. 8. 1383 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 吉田慎,竹内信貴,川波靖彦 梶原正憲,森勉: "Cu/Fe/Cu拡散対のFe相における拡散誘起再結晶の組織観察" 材料とプロセス. 8. 1382 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 川波靖彦,梶原正憲,森勉: "Cu/Fe/Cu拡散対のFe相における拡散誘起再結晶の速度論的解析" 材料とプロセス. 8. 1383 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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