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Rejuvenation of metallic glasses by disordering and relaxation controlling

Research Project

Project/Area Number 23656418
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Structural/Functional materials
Research InstitutionTohoku University

Principal Investigator

SAIDA Junji  東北大学, 学際科学国際高等研究センター, 准教授 (20359540)

Co-Investigator(Kenkyū-buntansha) WAKEDA Masato  大阪大学, 大学院・基礎工学研究科, 助教 (00550203)
Project Period (FY) 2011 – 2012
Project Status Completed (Fiscal Year 2012)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords金属ガラス / 構造緩和 / 不規則性 / 機械的性質 / 構造制御 / 相変態 / シミュレー ション / 不規則生 / シミュレーション
Research Abstract

Relaxation of glassy alloys is generally regarded as one of the important phenomena originating from the intrinsic random structure. Due to a strong correlation with structure, transformation, mechanical and magnetic properties of metallic glasses, we have to control the relaxation state carefully for industrial use. Relaxation state depends on a cooling rate just above glass transition temperature, Tg. We have investigated the recovery of the less relaxation state by low temperature annealing just above Tg and various cooling conditions in several glassy alloys by experimental and molecular dynamics (MD) simulation studies. The enthalpy of relaxation increases by such low temperature annealing at higher cooling rates with a significant mechanical softening. The MD simulation clearly indicates that the glassy alloys can be rejuvenated in the case of higher cooling rates than the initial one (i.e., cooling rate in the initial preparation of glass) by annealing over Tg. Such rejuvenation is saturated in the temperature range over 150 K above Tg. The result is consistent with the experimental one using Cu mold casting. The present study on recovering and controlling relaxation state provides useful information on the application of metallic glasses.

Report

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

    (16 results)

All 2013 2012 2011 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (13 results) (of which Invited: 2 results) Remarks (2 results)

  • [Journal Article] Primary transformation kinetics in Zr-Al-Ni-Cu-Pd bulk metallic glass correlated with relaxation, State2013

    • Author(s)
      J.Saida and A.D.Setyawan
    • Journal Title

      Met. Mater. Trans. A

      Volume: Vol.44A Issue: 5 Pages: 1998-2003

    • DOI

      10.1007/s11661-012-1321-3

    • Related Report
      2012 Annual Research Report 2012 Final Research Report
    • Peer Reviewed
  • [Presentation] Molecular dynamics study on a thermal rejuvenation of amorphous metals2013

    • Author(s)
      M. Wakeda, J. Saida, S. Ogata
    • Organizer
      142nd TMS Annual Meeting
    • Place of Presentation
      San Antonio, USA
    • Related Report
      2012 Final Research Report
  • [Presentation] Molecular dynamics study on a thermal rejuvenation of amorphous metals2013

    • Author(s)
      M. Wakeda, J. Saida, S. Ogata
    • Organizer
      142nd TMS Annual Meeting
    • Place of Presentation
      San Antonio, 米国
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Control of relaxation state for nanostructure formation based on glassy alloys2012

    • Author(s)
      J. Saida, A.D. Setyawan, M. Wakeda
    • Organizer
      5thSzeged International Workshop on Advances in Nanoscience (SIWAN5)
    • Place of Presentation
      Szeged, Hungary
    • Related Report
      2012 Final Research Report
  • [Presentation] An atomic study on the structural relaxation dynamics of amorphous metals2012

    • Author(s)
      M. Wakeda, J. Saida, S. Ogata
    • Organizer
      6th International Conference on Multiscale Materials Modeling
    • Place of Presentation
      Biopolis, Singapore
    • Related Report
      2012 Final Research Report
  • [Presentation] Preparation and transformation behaviors of relaxation-controlled Zr-based metallic glasses2012

    • Author(s)
      J. Saida, A.D. Setyawan, H. Kato, M.Wa keda
    • Organizer
      IUMRS International Conference in Asia 2012
    • Place of Presentation
      Busan, Korea
    • Related Report
      2012 Final Research Report
  • [Presentation] Primary transformation kinetics andmechanical properties of Zr-Al-Ni-Cu-based metallic glass in various relaxation states2012

    • Author(s)
      J. Saida, A.D. Setyawan
    • Organizer
      141st TMS AnnualMeeting
    • Place of Presentation
      Orland, USA
    • Related Report
      2012 Final Research Report
  • [Presentation] Preparation and transformation behaviors of relaxation-controlled Zr-based metallic glasses2012

    • Author(s)
      J. Saida, A.D. Setyawan, H. Kato, M. Wakeda
    • Organizer
      IUMRS International Conference in Asia 2012 (IUMRS-ICA 2012)
    • Place of Presentation
      Busan, 韓国
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] An Atomic Study on the Structural Relaxation Dynamics of Amorphous Metals2012

    • Author(s)
      M. Wakeda, J. Saida, S. Ogata
    • Organizer
      6th International Conference on MULTISCALE MATERIALS MODELING (MMM2012)
    • Place of Presentation
      Biopolis, シンガポール
    • Related Report
      2012 Annual Research Report
  • [Presentation] Control of Relaxation State for Nanostructure Formation Based on Glassy Alloys2012

    • Author(s)
      J. Saida, A.D. Setyawan
    • Organizer
      5th Szeged International Workshop on Advances in Nanoscience (SIWAN5)
    • Place of Presentation
      Szeged, ハンガリー
    • Related Report
      2012 Annual Research Report
  • [Presentation] 種々の緩和状態にある Zr-Al-Ni-Cu金属ガラスの初晶析出挙動と機械的性質2012

    • Author(s)
      J. Saida, A.D. Setyawan
    • Organizer
      TMS 141st annual Meeting & Exhibition(招待講演)
    • Place of Presentation
      オーランド、米国
    • Related Report
      2011 Research-status Report
  • [Presentation] 基金属ガラスにおける緩和状態制御と核生成および粒成長2011

    • Author(s)
      才田淳治、A.D.セトヤワン
    • Organizer
      第55回日本学術会議材料工学連合講演会
    • Place of Presentation
      京都.Zr
    • Related Report
      2012 Final Research Report
  • [Presentation] 種々の緩和状態にある Zr基金属ガラスの核生成と成長挙動2011

    • Author(s)
      J. Saida, A.D. Setyawan
    • Organizer
      第14回急冷および非平衡材料に関する国際会議(招待講演)
    • Place of Presentation
      サルバドール、ブラジル
    • Related Report
      2011 Research-status Report
  • [Presentation] Zr基金属ガラスにおける緩和状態の制御と核生成および粒成長

    • Author(s)
      才田淳治, A.D. Setyawan
    • Organizer
      第55回日本学術会議 材料工学連合講演会
    • Place of Presentation
      京都
    • Related Report
      2011 Research-status Report
  • [Remarks] 東北大学研究者紹介

    • URL

      http://db.tohoku.ac.jp/whois/

    • Related Report
      2012 Final Research Report
  • [Remarks] 東北大学学際科学フロンティア研究所

    • URL

      http://www.cir.tohoku.ac.jp/j/

    • Related Report
      2012 Final Research Report

URL: 

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

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