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Quantitative analysis of crystalline defects that control anomalous properties of severely-deformed metals and investigation of their thermal stability

Research Project

Project/Area Number 21360311
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Physical properties of metals
Research InstitutionOsaka Prefecture University

Principal Investigator

NUMAKURA Hiroshi  大阪府立大学, 大学院・工学研究科, 教授 (40189353)

Co-Investigator(Kenkyū-buntansha) SEMBOSHI Satoshi  東北大学, 金属材料研究所, 講師 (00364026)
Co-Investigator(Renkei-kenkyūsha) TSUJI Nobuhiro  京都大学, 大学院・工学研究科, 教授 (30263213)
TERADA Daisuke  京都大学, 大学院・工学研究科, 助教 (80432524)
Project Period (FY) 2009 – 2011
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2011: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2010: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2009: ¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000)
Keywords格子欠陥 / 結晶塑性 / 力学特性 / 微細組織 / 回復・再結晶 / 結晶粒微細化 / 弾性 / 内部摩擦 / メカニカル・スペクトロスコピー
Research Abstract

Severely cold-worked metals by special shape-invariant deformation techniques exhibit such interesting mechanical properties as unusual strength and super-plasticity. In the present research, we have studied the type and the density of the defects introduced by the deformation and their thermal stability by various techniques such as measurements of electrical resistivity and dynamic elastic modulus. It has been found that the size of crystal grains is reduced less efficiently in materials of higher purity, indicating that impurities are advantageous for preparing ultra-fine-grained metals. It also turned out that impurities contribute to the thermal stability of the defects and the fine-grained microstructure.

Report

(4 results)
  • 2011 Annual Research Report   Final Research Report ( PDF )
  • 2010 Annual Research Report
  • 2009 Annual Research Report
  • Research Products

    (16 results)

All 2012 2011 2010 2009 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (12 results) Remarks (3 results)

  • [Journal Article] Characterization of defects in severely deformed iron by mechanical spectroscopy2012

    • Author(s)
      T. Akaki, H. Morimoto, H. Numakura, D. Terada, N. Tsuji
    • Journal Title

      Solid State Phenomena

      Volume: Vol.184 Pages: 233-238

    • DOI

      10.4028/www.scientific.net/ssp.184.233

    • Related Report
      2011 Annual Research Report 2011 Final Research Report
    • Peer Reviewed
  • [Presentation] 超強加工した鉄中の格子欠陥挙動へ及ぼす固溶炭素原子の影響2011

    • Author(s)
      赤木智行
    • Organizer
      日本金属学会2011年秋期(第149回)大会
    • Place of Presentation
      宜野湾市
    • Year and Date
      2011-11-07
    • Related Report
      2011 Annual Research Report 2011 Final Research Report
  • [Presentation] Characterization of defects in severely deformed metals by mechanical spectroscopy2011

    • Author(s)
      T. Akaki
    • Organizer
      The 16th International Conference on Internal Friction and Mechanical Spectroscopy
    • Place of Presentation
      ローザンヌ市(スイス連邦)
    • Year and Date
      2011-07-05
    • Related Report
      2011 Annual Research Report 2011 Final Research Report
  • [Presentation] 超強加工したニッケル中の欠陥とその熱的安定性2010

    • Author(s)
      赤木智行
    • Organizer
      日本金属学会2010年秋期(第147回)大会
    • Place of Presentation
      札幌市
    • Year and Date
      2010-09-25
    • Related Report
      2011 Final Research Report
  • [Presentation] 超強加工したニッケル中の欠陥とその熱的安定性2010

    • Author(s)
      赤木智行
    • Organizer
      日本金属学会2010年秋期(第147回)大会
    • Place of Presentation
      北海道大学(北海道札幌市)
    • Year and Date
      2010-09-25
    • Related Report
      2010 Annual Research Report
  • [Presentation] ARBで超強加工した純鉄中の結晶欠陥とその密度に及ぼす固溶炭素・窒素の影響2010

    • Author(s)
      沼倉宏
    • Organizer
      日本金属学会2010年春期(第146回)大会
    • Place of Presentation
      つくば市
    • Year and Date
      2010-03-30
    • Related Report
      2011 Final Research Report
  • [Presentation] ARB/ECAPによって超強加工した純アルミニウム中の欠陥評価2010

    • Author(s)
      沼倉宏
    • Organizer
      日本金属学会2010年春期(第146回)大会
    • Place of Presentation
      つくば市
    • Year and Date
      2010-03-30
    • Related Report
      2011 Final Research Report
  • [Presentation] ARBで超強加工した純鉄中の結晶欠陥とその密度に及ぼす固溶炭素・窒素の影響2010

    • Author(s)
      沼倉宏
    • Organizer
      日本金属学会2010年春期(第146回)大会
    • Place of Presentation
      筑波大学(茨城県)
    • Year and Date
      2010-03-30
    • Related Report
      2009 Annual Research Report
  • [Presentation] ARB/ECAPによって超強加工した純アルミニウム中の欠陥評価2010

    • Author(s)
      沼倉宏
    • Organizer
      日本金属学会2010年春期(第146回)大会
    • Place of Presentation
      筑波大学(茨城県)
    • Year and Date
      2010-03-30
    • Related Report
      2009 Annual Research Report
  • [Presentation] 巨大ひずみ加工した純鉄中の欠陥とその安定性2009

    • Author(s)
      森本肇
    • Organizer
      日本金属学会2009年秋期(第145回)大会
    • Place of Presentation
      京都市
    • Year and Date
      2009-09-17
    • Related Report
      2011 Final Research Report
  • [Presentation] 超強加工したアルミニウム中の欠陥のキャラクタリゼーション2009

    • Author(s)
      竹本勇介
    • Organizer
      日本金属学会2009年秋期(第145回)大会
    • Place of Presentation
      京都市
    • Year and Date
      2009-09-17
    • Related Report
      2011 Final Research Report
  • [Presentation] 超強加工したアルミニウム中の欠陥のキャラクタリゼーション2009

    • Author(s)
      竹本勇介
    • Organizer
      日本金属学会2009年秋期(第145回)大会
    • Place of Presentation
      京都大学(京都府)
    • Year and Date
      2009-09-17
    • Related Report
      2009 Annual Research Report
  • [Presentation] 巨大ひずみ加工した純鉄中の欠陥とその安定性2009

    • Author(s)
      森本肇
    • Organizer
      日本金属学会2009年秋期(第145回)大会
    • Place of Presentation
      京都大学(京都府)
    • Year and Date
      2009-09-17
    • Related Report
      2009 Annual Research Report
  • [Remarks]

    • URL

      http://www.engm.mtr.osakafu-u.ac.jp/

    • Related Report
      2011 Final Research Report
  • [Remarks]

    • URL

      http://www.engm.mtr.osakafu-u.ac.jp/

    • Related Report
      2010 Annual Research Report
  • [Remarks]

    • URL

      http://www.engm.mtr.osakafu-u.ac.jp/

    • Related Report
      2009 Annual Research Report

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Published: 2009-04-01   Modified: 2016-04-21  

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