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Multi-scale analysis of omega transformation using novel microscopy techniques

Research Project

Project/Area Number 23360281
Research Category

Grant-in-Aid for Scientific Research (B)

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

Principal Investigator

NISHIDA Minoru  九州大学, 総合理工学研究科(研究院), 教授 (90183540)

Co-Investigator(Kenkyū-buntansha) ITAKURA Masaru  九州大学, 大学院・総合理工学研究院, 准教授 (20203078)
HATA Satoshi  九州大学, 大学院・総合理工学研究院, 准教授 (60264107)
MITSUHARA Masatoshi  九州大学, 大学院・総合理工学研究院, 助教 (10514218)
FARJAMI Sahar  九州大学, 大学院・総合理工学研究院, 助教 (20588173)
HARA Toru  独立行政法人, 物質・材料研究機構・表界面構造・物性ユニット, 主幹研究員 (70238161)
Project Period (FY) 2011-04-01 – 2014-03-31
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥19,500,000 (Direct Cost: ¥15,000,000、Indirect Cost: ¥4,500,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2012: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2011: ¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
Keywords相変態 / ベータチタン合金 / ベータジルコニウム合金 / トモグラフィー / 収差補正走査透過電子顕微鏡 / 高角散乱環状暗視野像 / チャネリングコントラスト / 結晶学 / β-Ti合金 / β-Zr合金 / TEMトモグラフィー / オメガ(ω)変態 / β‐チタン合金 / β‐ジルコニウム合金 / 電子線トモグラフィー / 収差補正HAADF-STEM / オメガ(ω)変態 / β-チタン合金 / β-ジルコニウム合金 / 3Dトモグラフィー
Research Abstract

Following five unsolved problems in omega transformation in beta-Ti and Zr alloys were investigated; crystallographic difference between athermal and isothermal phases, real dimensional analysis of athermal and isothermal phases, effect of metallurgical factors on morphology and crystallography, transformation mechanism and relation between omega transformation and precursor phenomena of thermoelasticmartensi tic transformation.
We succeeded in direct observation of the characteristic atomic arrangement with dumbbell structure in athermal and isothermal omega- phases beta-Ti and Zr alloys by high-angleannular dark field scanning transmission electron microscopy. The relative atomic displacement in the dumbbell structure was quantitatively estimated. The displacement gradually increased from 0.5 at the inner region of omega to 0.67 at omega/beta interface. The relation between transformation mechanism and each of omega morphologies has been also discussed on the basis of 3D tomography.

Report

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

    (19 results)

All 2013 2012 2011 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (13 results) Remarks (5 results)

  • [Journal Article] HAADF-STEM studies of athermal and isothermal w-phases in β-Zr alloy2012

    • Author(s)
      E.Okunishi
    • Journal Title

      Journal of Alloys and Compounds

      Volume: (In press) Pages: S713-S716

    • DOI

      10.1016/j.jallcom.2011.12.115

    • Related Report
      2013 Final Research Report 2011 Annual Research Report
    • Peer Reviewed
  • [Presentation] HAADF-STEMを用いたβ-Ti 合金におけるω 相の観察2013

    • Author(s)
      吹留佳祐, 奥西栄治, Sahar Farjami, 光原昌寿, 板倉賢, 西田稔
    • Organizer
      日本金属学会2013年秋期(第153回)大会
    • Place of Presentation
      金沢大学優秀ポスター賞受賞
    • Year and Date
      2013-09-17
    • Related Report
      2013 Final Research Report
  • [Presentation] HAADF-STEM studies of athermal and isothermal ω-phases in Ti and Zr alloys2013

    • Author(s)
      E. Okunishi, T. Kawai, M. Mitsuhara, M. Nishida
    • Organizer
      5th International conference on Recrystallization & Grain Growth (REXGG-5)
    • Place of Presentation
      Sydney, Australia
    • Year and Date
      2013-05-06
    • Related Report
      2013 Final Research Report
  • [Presentation] α+β二相型Ti-Fe-O-N 合金の長時間時効析出挙動2013

    • Author(s)
      光原昌寿, 永瀬孝文, 西田稔, 國枝智徳, 藤井秀樹
    • Organizer
      日本金属学会2013年春期(第152回)大会
    • Place of Presentation
      東京理科大学
    • Year and Date
      2013-03-29
    • Related Report
      2013 Final Research Report
  • [Presentation] β-Ti合金におけるω相のHAADF-STEM観察2013

    • Author(s)
      吹留 佳祐, Sahar Farjami, 光原 昌寿, 板倉 賢, 西田 稔, 奥西 栄治
    • Organizer
      平成25 年度日本金属学会・日本鉄鋼協会・軽金属学会九州支部合同学術講演会
    • Place of Presentation
      熊本県民交流館パレア
    • Related Report
      2013 Annual Research Report
  • [Presentation] HAADF-STEM を用いたβ-Ti 合金におけるω 相の観察2013

    • Author(s)
      吹留 佳祐, 奥西 栄治, Sahar Farjami, 光原 昌寿, 板倉 賢, 西田 稔
    • Organizer
      日本金属学会秋期大会(第153回)
    • Place of Presentation
      金沢大学
    • Related Report
      2013 Annual Research Report
  • [Presentation] HAADF-STEM を用いたβ-Ti 合金におけるω相の原子像観察2013

    • Author(s)
      吹留 佳祐, 奥西 栄治, Sahar Farjami, 光原 昌寿, 板倉 賢, 西田 稔
    • Organizer
      日本顕微鏡学会九州支部総会・学術講演会(第55 回)
    • Place of Presentation
      九州大学
    • Related Report
      2013 Annual Research Report
  • [Presentation] 長時間時効したTi-Fe-O-N合金の硬度変化と時効析出物の関係2013

    • Author(s)
      永瀬孝文
    • Organizer
      日本金属学会2013年春期(第152回)大会
    • Place of Presentation
      東京理科大学
    • Related Report
      2012 Annual Research Report
  • [Presentation] α+β二相型Ti-Fe-O-N合金の長時間時効析出挙動2013

    • Author(s)
      光原昌寿
    • Organizer
      日本金属学会2013年春期(第152回)大会
    • Place of Presentation
      東京理科大学
    • Related Report
      2012 Annual Research Report
  • [Presentation] HAADF-STEM studies of athermal and isothermal phases in Ti and Zr alloys2013

    • Author(s)
      Eiji OKUNISHI
    • Organizer
      Rex&GG (5th International conference on Recrystallization & Grain Growth)
    • Place of Presentation
      Sydney, Australia
    • Related Report
      2012 Annual Research Report
  • [Presentation] Application of novel SEM, TEM and STEM techniques for multi-scale analysis in TiNi and β-Ti2011

    • Author(s)
      M. Mitsuhara, E. Okunishi, M. Nishida
    • Organizer
      International Conference on Martensitic Transformation 2011 (ICOMAT-2011)
    • Place of Presentation
      Toyonaka, Osaka, Japan
    • Year and Date
      2011-09-09
    • Related Report
      2013 Final Research Report
  • [Presentation] Application of novel SEM, TEM and STEM techniques for multi-scale analysis in TiNi and β-Ti alloy2011

    • Author(s)
      Masatoshi Mitsuhara
    • Organizer
      International Conference on Martensitic Trasnformation-2011
    • Place of Presentation
      Senri Hankyu Hotel, Toyonaka, Osaka(招待講演)
    • Year and Date
      2011-09-09
    • Related Report
      2011 Annual Research Report
  • [Presentation] HAADF-STEM studies of athermal and isothermal ω-phases in β-Tiand Zr alloys2011

    • Author(s)
      Eiji Okunishi
    • Organizer
      International Conference on Martensitic Trasnformation-2011
    • Place of Presentation
      Senri Hankyu Hotel, Toyonaka, Osaka
    • Year and Date
      2011-09-05
    • Related Report
      2011 Annual Research Report
  • [Presentation] α+β型Ti-Fe-O-N系合金の時効硬化と析出挙動2011

    • Author(s)
      永瀬孝文
    • Organizer
      日本金属学会九州支部日本鉄鋼協会九州支部軽金属学会九州支部平成23年度合同学術講演会
    • Place of Presentation
      九州大学筑紫キャンパス
    • Year and Date
      2011-06-11
    • Related Report
      2011 Annual Research Report
  • [Remarks] 九州大学総合理工学研究院融合創造理工学部門結晶物性工学研究室

    • URL

      http://www.asem.kyushu-u.ac.jp/of/of01/

    • Related Report
      2013 Final Research Report
  • [Remarks] 結晶物性工学研究室

    • URL

      http://www.asem.kyushu-u.ac.jp/of/of01/page1/index.html

    • Related Report
      2013 Annual Research Report
  • [Remarks] 科学研究費補助金

    • URL

      http://www.asem.kyushu-u.ac.jp/of/of01/page1/page68/page68.html

    • Related Report
      2013 Annual Research Report
  • [Remarks] 結晶物性工学研究室

    • URL

      http://www.asem.kyushu-u.ac.jp/of/of01/page1/index.html

    • Related Report
      2012 Annual Research Report
  • [Remarks] 科学研究費補助金

    • URL

      http://www.asem.kyushu-u.ac.jp/of/of01/page1/page68/page68.html

    • Related Report
      2012 Annual Research Report

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Published: 2011-04-06   Modified: 2019-07-29  

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