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Development of novel mechanical processing method of GA steel sheets using stress-induced phase transformation

Research Project

Project/Area Number 23656451
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Material processing/treatments
Research InstitutionThe University of Tokyo

Principal Investigator

YAMAGUCHI Shu  東京大学, 工学(系)研究科(研究院), 教授 (10182437)

Co-Investigator(Kenkyū-buntansha) TANAKA Kazuhiko  東京大学, 大学院・工学系研究科, 技術専門職員 (20456156)
Project Period (FY) 2011 – 2012
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords溶融亜鉛めっき / めっき層 / 応力誘起変態 / 相転移 / ダイヤモンドアンビル / X線回折 / Fe / Zn / めっきプロセス / 金属間化合物 / モル体積 / 熱力学諸量
Research Abstract

Based on the hypothesis that plastic deformability appears by the stress-induced transformation from the Fe-Zn intermetallic compounds to hcp/fcc phase, X-ray powder diffraction analysis using a diamond anvil was carried out to estimate the critical pressure of transformation and bulk modulus of the Fe-Zn intermetallics at low- and high-pressure conditions. The samples of zeta and Gamma1 phases collected as the dross phase in the previous study, were examined for the possible presence of phase transitions. No phase transition was observed for the Gamma1 phase up to 30GPa at room temperature, while clear evidence of the phase transition to the hcp phase for the zeta phase was obtained. The phase stability was estimated based on the calculation of the assessed free energy change of mixing (chemical energy) for the Fe-Zn system and estimated values of the bulk modulus and molar volume for the low- and high-pressure phase, and the critical pressures for the phase transitions are proposed.

Report

(4 results)
  • 2013 Annual Research Report   Final Research Report ( PDF )
  • 2012 Research-status Report
  • 2011 Research-status Report
  • Research Products

    (14 results)

All 2014 2013 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (10 results) (of which Invited: 2 results) Remarks (2 results)

  • [Journal Article] Compression Deformability of Γ and ζ Fe-Zn Intermetallics to Mitigate Detachment of Brittle Intermetallic Coating of Galvannealed Steels2013

    • Author(s)
      N.L. Okamoto, D. Kashioka, M. Inomoto, H. Inui, and S. Yamaguchi
    • Journal Title

      Scripta Materialia

      Volume: Vol.669, No.4 Issue: 4 Pages: 307-310

    • DOI

      10.1016/j.scriptamat.2013.05.003

    • Related Report
      2013 Final Research Report
    • Peer Reviewed
  • [Journal Article] Compression Deformability of Γ and ζ Fe-Zn Intermetallics to Mitigate Detachment of Brittle Intermetallic Coating of Galvannealed Steels2013

    • Author(s)
      N. L. Okamoto, D. Kashioka, M. Inomoto, H. Inui, H. Takabayashi, and S. Yamaguchi
    • Journal Title

      Scripta Materialia

      Volume: 69, No. 4 Pages: 307-310

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Presentation] Fe-Zn系金属間化合物における高圧相変態の熱力学2014

    • Author(s)
      上田涼平, 田中和彦, 三好正悟, 山口周
    • Organizer
      第167回日本鉄鋼協会春季講演大会
    • Place of Presentation
      東京工業大学(東京)
    • Year and Date
      2014-03-23
    • Related Report
      2013 Final Research Report
  • [Presentation] 溶融亜鉛めっきの熱力学的研究2014

    • Author(s)
      山口周
    • Organizer
      第167回日本鉄鋼協会春季講演大会
    • Place of Presentation
      東京工業大学(東京)
    • Year and Date
      2014-03-23
    • Related Report
      2013 Final Research Report
  • [Presentation] 溶融亜鉛めっきプロセスの熱力学2014

    • Author(s)
      山口周
    • Organizer
      平成25年度日本金金属学会, 日本鉄鋼協会両北海道支部合同冬季講演大会
    • Place of Presentation
      北海道立道民活動センター(かかでる 27)(北海道)
    • Year and Date
      2014-01-23
    • Related Report
      2013 Final Research Report
    • Invited
  • [Presentation] Fe-Zn系金属間化合物の高圧相変態2013

    • Author(s)
      上田涼平, 山口周, 三好正悟, 田中和彦, 岡田卓
    • Organizer
      日本鉄鋼協会第166回講演大会
    • Place of Presentation
      金沢大学(石川)
    • Year and Date
      2013-09-19
    • Related Report
      2013 Final Research Report
  • [Presentation] DACを用いた高圧下におけるFe-Zn系金属間化合物の相変態挙動2013

    • Author(s)
      上田涼平, 岡田卓, 田中和彦, 三好正悟, 山口周
    • Organizer
      電気化学会新しい固体化学の指針を探る研究会若手研究発表会
    • Place of Presentation
      東京工業大学(東京)
    • Year and Date
      2013-03-07
    • Related Report
      2013 Final Research Report
  • [Presentation] DACを用いた高圧下におけるFe-Zn系金属間化合物の相変態挙動2013

    • Author(s)
      上田 涼平,岡田 卓,田中 和彦,三好 正悟,山口 周
    • Organizer
      電気化学会・新しい固体化学の指針を探る研究会・若手研究発表会
    • Place of Presentation
      東京工業大学(東京都目黒区)
    • Related Report
      2012 Research-status Report
  • [Presentation] Fe-Zn系金属間化合物の高圧相変態

    • Author(s)
      上田涼平、山口周、三好正悟、田中和彦、岡田卓
    • Organizer
      日本鉄鋼協会 第166回講演大会
    • Place of Presentation
      金沢大学(石川)
    • Related Report
      2013 Annual Research Report
  • [Presentation] 溶融亜鉛めっきプロセスの熱力学

    • Author(s)
      山口 周
    • Organizer
      平成25年度日本金属学会、日本鉄鋼協会 両北海道支部合同冬季講演大会
    • Place of Presentation
      北海道立道民活動センター(かでる27)(北海道)
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] 溶融亜鉛めっきの熱力学的研究

    • Author(s)
      山口 周
    • Organizer
      第167回日本鉄鋼協会 春季講演大会
    • Place of Presentation
      東京工業大学(東京)
    • Related Report
      2013 Annual Research Report
  • [Presentation] Fe-Zn系金属間化合物における高圧相変態の熱力学

    • Author(s)
      上田涼平、田中和彦、三好正悟、山口周
    • Organizer
      第167回日本鉄鋼協会 春季講演大会
    • Place of Presentation
      東京工業大学(東京)
    • Related Report
      2013 Annual Research Report
  • [Remarks]

    • URL

      http://www.ionics.t.u-tokyo.ac.jp/

    • Related Report
      2013 Final Research Report
  • [Remarks] 東京大学 大学院工学系研究科 マテリアル工学専攻 イオニクス(山口)研究室

    • URL

      http://www.ionics.t.u-tokyo.ac.jp/

    • Related Report
      2013 Annual Research Report

URL: 

Published: 2011-08-05   Modified: 2019-07-29  

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