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Visualization of interior originating small cracks in high strength titanium alloy and the clarification of very high cycle fatigue mechanisms

Research Project

Project/Area Number 24246024
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Materials/Mechanics of materials
Research InstitutionHokkaido University

Principal Investigator

NAKAMURA Takashi  北海道大学, 工学(系)研究科(研究院), 教授 (30237408)

Co-Investigator(Kenkyū-buntansha) SHIBAYAMA Tamaki  北海道大学, 工学研究院, 准教授 (10241564)
SHIOZAWA Daiki  神戸大学, 工学研究科, 准教授 (60379336)
NAKAI Yoshikazu  神戸大学, 工学研究科, 教授 (90155656)
小熊 博幸  北海道大学, 工学(系)研究科(研究院), 准教授 (80515122)
渡辺 精一  北海道大学, 工学(系)研究科(研究院), 教授 (60241353)
Co-Investigator(Renkei-kenkyūsha) UESUGI Kentarou  光輝度光科学研究センター, 研究員 (80344399)
Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥44,460,000 (Direct Cost: ¥34,200,000、Indirect Cost: ¥10,260,000)
Fiscal Year 2014: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Fiscal Year 2013: ¥14,430,000 (Direct Cost: ¥11,100,000、Indirect Cost: ¥3,330,000)
Fiscal Year 2012: ¥23,400,000 (Direct Cost: ¥18,000,000、Indirect Cost: ¥5,400,000)
Keywords疲労 / ギガサイクル疲労 / トモグラフィ / 内部起点型疲労亀裂 / 疲労亀裂進展 / 放射光 / 真空 / チタン合金 / 内部起点型破壊 / き裂伝搬 / 超高サイクル疲労 / き裂発生 / き裂伝播
Outline of Final Research Achievements

Observations of internal fatigue cracks in Ti alloy were made by using synchrotron radiation micro CT imaging in the large synchrotron radiation facility (SPring-8) .Uniaxial fatigue tests were repeated on the specimen over 1.0E7 cycles, and the growth of the internal fatigue crack was measured by micro CT imaging. To investigate the effects of the environment around internal fatigue crack on crack growth process, the relationship between da/dN and stress intensity factor range were compared with that of surface cracks in vacuum environment. As a result, internal fatigue crack propagated quite slowly at a rate below 1.0E-10m/cycle. However, the fatigue crack advanced rapidly at a rate of around 1.0E-7m/cycle after reaching at the surface of specimen. Crack growth rate of internal crack agreed quite well with that of surface crack in vacuum. Therefore, vacuum-like environment around internal crack has an important role of fatigue crack process in the very high cycle regime.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Annual Research Report
  • 2012 Annual Research Report
  • Research Products

    (16 results)

All 2015 2014 2013 2012

All Journal Article (6 results) (of which Acknowledgement Compliant: 2 results,  Open Access: 3 results,  Peer Reviewed: 1 results) Presentation (10 results)

  • [Journal Article] Ti-6Al-4Vにおける内部起点型疲労き裂進展の放射光µCTイメージングによる観察2014

    • Author(s)
      吉中奎貴,中村孝,中山慎也,塩澤大輝,中井善一,上杉健太朗
    • Journal Title

      日本材料学会第32回疲労シンポジウム講演論文集

      Volume: 1 Pages: 223-227

    • Related Report
      2014 Annual Research Report
    • Acknowledgement Compliant
  • [Journal Article] Ti-6Al-4V 合金における微小疲労亀裂進展に及ぼす真空環境の影響2014

    • Author(s)
      髙久和明,中村孝,小熊博幸
    • Journal Title

      日本機械学会M&M2014 カンファレンス

      Volume: OS2105

    • Related Report
      2014 Annual Research Report
  • [Journal Article] Ti-6Al-4V 合金における材料内部組織の放射光μCT イメージングによる非破壊観察2014

    • Author(s)
      中村孝,高久和明,吉中奎貴,塩澤大輝,中井喜一,上杉健太朗
    • Journal Title

      平成26 年度SPring-8 一般課題実験報告書

      Volume: 2014A1459

    • Related Report
      2014 Annual Research Report
    • Open Access
  • [Journal Article] Ti-6Al-4V 合金における内部起点型微小疲労き裂の発生および進展初期過程のμCT イメージングによる観察2014

    • Author(s)
      中村孝,高久和明,吉中奎貴,塩澤大輝,中井喜一,上杉健太朗
    • Journal Title

      平成26 年度SPring-8 成果公開優先利用課題実験報告書

      Volume: 2014A1020

    • Related Report
      2014 Annual Research Report
    • Open Access
  • [Journal Article] 4D analysis of pit growth and crack initiation in aluminum alloy under corrosion fatigue using synchrotron radiation micro CT imaging2014

    • Author(s)
      塩澤大輝,岡田宗大,中井善一
    • Journal Title

      Journal of Japan Institute of Light Metals

      Volume: 64 Issue: 11 Pages: 564-569

    • DOI

      10.2464/jilm.64.564

    • NAID

      130004775045

    • ISSN
      0451-5994, 1880-8018
    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Fatigue Crack Propagation Mode Transition under Cyclic Torsion Using Micro-CT Imaging with Ultra-Bright Synchrotron Radiation2012

    • Author(s)
      Y. Nakai, D. Shiozawa, T. Murakami, and H. Nosho
    • Journal Title

      Proceedings of the 4th International Conference on Crack Paths

      Volume: -

    • Related Report
      2012 Annual Research Report
  • [Presentation] Observation of internal small fatigue cracks in Ti-6Al-4V by using synchrotron radiation micro-computed tomography imaging at SPring-82015

    • Author(s)
      Yoshinaka,T. Nakamura,D. Shiozawa,Y. Nakai,K. Uesugi
    • Organizer
      International Conference on Advanced Technology in Experimental Mechanics 2015 (ATEM’15)
    • Place of Presentation
      LOISIR HOTEL TOYOHASHI
    • Year and Date
      2015-10-04 – 2015-10-08
    • Related Report
      2014 Annual Research Report
  • [Presentation] 高輝度放射光の回折コントラストイメージングによる疲労過程中の転位構造変化の観察2015

    • Author(s)
      中井善一,塩澤大輝,松田翔太,中尾亮太,淺川直也,菊池将一
    • Organizer
      日本機械学会関西支部,第90期定時総会講演会
    • Place of Presentation
      京都
    • Year and Date
      2015-03-16 – 2015-03-17
    • Related Report
      2014 Annual Research Report
  • [Presentation] Ti-6Al-4Vにおける内部起点型疲労き裂進展の放射光µCTイメージングによる観察2014

    • Author(s)
      吉中奎貴,中村孝,中山慎也,塩澤大輝,中井善一,上杉健太朗
    • Organizer
      日本材料学会第32回疲労シンポジウム
    • Place of Presentation
      高山市民文化会館
    • Year and Date
      2014-11-06 – 2014-11-08
    • Related Report
      2014 Annual Research Report
  • [Presentation] Ti-6Al-4V 合金における微小疲労亀裂進展に及ぼす真空環境の影響2014

    • Author(s)
      髙久和明,中村孝,小熊博幸
    • Organizer
      日本機械学会M&M2014 カンファレンス
    • Place of Presentation
      福島
    • Year and Date
      2014-07-19 – 2014-07-21
    • Related Report
      2014 Annual Research Report
  • [Presentation] 放射光μCTイメージングを用いたTi-6Al-4V内部に発生する微小疲労き裂の検出 OS13072013

    • Author(s)
      中山慎也,中村孝,小熊博幸,塩澤大輝,中井善一,上杉健太朗
    • Organizer
      日本機械学会M&M2013カンファレンス
    • Place of Presentation
      岐阜大学(岐阜市)
    • Related Report
      2013 Annual Research Report
  • [Presentation] 高輝度放射光を用いた回折コントラストトモグラフィによる疲労損傷評価に関する検討 OS15032013

    • Author(s)
      松田翔太,政田尚也,塩澤大輝,中井善一,三浦亮太郎
    • Organizer
      日本機械学会M&M2013カンファレンス
    • Place of Presentation
      岐阜大学(岐阜市)
    • Related Report
      2013 Annual Research Report
  • [Presentation] 高輝度放射光を用いた回折コントラストイメージによるき裂発生過程の結晶組織観察2013

    • Author(s)
      政田尚也, 松田翔太, 塩澤大輝, 中井善一
    • Organizer
      日本材料学会第16回破壊力学シンポジウム
    • Place of Presentation
      阿蘇ファームランド(阿蘇村)
    • Related Report
      2013 Annual Research Report
  • [Presentation] 超高サイクル疲労機構の解明を目指して2013

    • Author(s)
      中村 孝
    • Organizer
      日本材料学会北海道支部第13期総会・特別講演会
    • Place of Presentation
      北海道大学(北海道札幌市)
    • Related Report
      2012 Annual Research Report
  • [Presentation] 放射光μCTイメージモデルに基づいた有限要素解析によるねじり疲労き裂進展挙動の評価2013

    • Author(s)
      納庄宏明,塩澤大輝,中井善一
    • Organizer
      日本機械学会関西支部第88期定時総会講演会
    • Place of Presentation
      大阪工業大学(大阪府大阪市)
    • Related Report
      2012 Annual Research Report
  • [Presentation] 放射光μCT及び小型転動疲労試験機を用いた高強度鋼における転動疲労下のき裂進展過程の観察2013

    • Author(s)
      佐藤一矢, 塩澤大輝,根石豊,牧野泰三,中井善一
    • Organizer
      平成24年度関西学生会卒業研究発表会
    • Place of Presentation
      大阪工業大学(大阪府大阪市)
    • Related Report
      2012 Annual Research Report

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Published: 2013-05-15   Modified: 2019-07-29  

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