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Investigation of hydrogen assisted crack growth mechanism in very long life regime based on the evaluation of local mechanical properties

Research Project

Project/Area Number 15K05686
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Materials/Mechanics of materials
Research InstitutionAoyama Gakuin University

Principal Investigator

Ogawa Takeshi  青山学院大学, 理工学部, 教授 (50167318)

Co-Investigator(Kenkyū-buntansha) 蓮沼 将太  青山学院大学, 理工学部, 助教 (50709764)
Project Period (FY) 2015-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords構造・機能材料 / 材料強度 / 局所力学特性 / 水素助長き裂進展機構 / 超長寿命域 / インデンテーション法 / 水素 / 超音波疲労
Outline of Final Research Achievements

The present study developed an improved method to estimate local mechanical properties by indentation tests and investigated the humid gas stress corrosion cracking (HG-SCC) characteristics of aluminum alloys for hydrogen containers and the effect of hydrogen on the fatigue strength of very high cycle regime. The developed indentation method enabled us to predict local stress-strain response in the plastic region in terms of the observation of dents impressed on the specimen surface. However, it was found that this method had size effect attributed to the geometrically necessary dislocation and that the behavior was essential phenomenon. Therefore, other methods were used to investigate the mechanisms of HG-SCC of aluminum alloys and the very high cycle fatigue of bearing steels.

Report

(4 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (11 results)

All 2018 2017 2016 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 4 results,  Acknowledgement Compliant: 1 results) Presentation (6 results) Remarks (1 results)

  • [Journal Article] Investigation of the indentation size effect based on measurement of the geometrically necessary dislocation density by electron backscatter diffraction2018

    • Author(s)
      Shota HASUNUMA, Hirohisa MIYAZAKI, Kensuke SHIMADA, Takeshi OGAWA
    • Journal Title

      Mechanical Engineering Journal

      Volume: 5 Issue: 2 Pages: 17-00638-17-00638

    • DOI

      10.1299/mej.17-00638

    • NAID

      130006707937

    • ISSN
      2187-9745
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Measurement of Tensile Deformation Behavior and Strength Evaluation Based on Local Mechanical Properties of Weld Joint of Steel Plates2017

    • Author(s)
      中島 康毅、蓮沼 将太、小川 武史、山谷 真和、櫻井 一弥
    • Journal Title

      Journal of High Pressure Institute of Japan

      Volume: 55 Issue: 6 Pages: 303-312

    • DOI

      10.11181/hpi.55.303

    • NAID

      130006275082

    • ISSN
      0387-0154, 1347-9598
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Study on Evaluation Methods for Stress Corrosion Cracking and Fatigue Crack Growth of Aluminum Alloys for Hydrogen Containers2016

    • Author(s)
      小川武史,蓮沼将太,渡邉翔太,寒川直輝,金崎俊彦,間野覚文,宮川一夫
    • Journal Title

      Journal of High Pressure Institute of Japan

      Volume: 54 Issue: 6 Pages: 277-288

    • DOI

      10.11181/hpi.54.277

    • NAID

      130006846362

    • ISSN
      0387-0154, 1347-9598
    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Estimation of Local Mechanical Properties of Steels by Hardness Tests and Its Application to Welded Pipes2016

    • Author(s)
      中島弘毅,齋藤裕樹,蓮沼将太,小川武史
    • Journal Title

      Journal of High Pressure Institute of Japan

      Volume: 54 Issue: 1 Pages: 16-24

    • DOI

      10.11181/hpi.54.16

    • NAID

      130005126555

    • ISSN
      0387-0154, 1347-9598
    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] Al-Mg-Si系合金の湿潤ガス応力腐食割れ特性に及ぼす化学成分の影響2017

    • Author(s)
      平野翔覇,白輪地峻輝,蓮沼将太,小川武史
    • Organizer
      日本機械学会関東支部第23期総会・講演会
    • Place of Presentation
      東京理科大学
    • Year and Date
      2017-03-16
    • Related Report
      2016 Research-status Report
  • [Presentation] 疲労き裂進展または応力腐食割れ機構が支配的となるアルミニウム合金のき裂進展特性2017

    • Author(s)
      齋藤 奨, 加藤俊輔, 鈴木俊平, 蓮沼将太, 小川武史, 間野覚文, 宮川一夫
    • Organizer
      M&M2017 材料力学カンファレンス
    • Related Report
      2017 Annual Research Report
  • [Presentation] 湿潤環境におけるアルミニウム合金の超低速疲労き裂進展挙動の検討2017

    • Author(s)
      鈴木俊平, 蓮沼将太, 小川武史, 間野覚文, 宮川一夫
    • Organizer
      M&M2017 材料力学カンファレンス
    • Related Report
      2017 Annual Research Report
  • [Presentation] 6000系Al合金の高応力比における疲労き裂進展特性の超音波疲労試験による評価2016

    • Author(s)
      鈴木俊平, 蓮沼将太, 小川武史, 間野覚文, 宮川一夫
    • Organizer
      日本機械学会2016年度年次大会
    • Place of Presentation
      九州大学
    • Year and Date
      2016-09-12
    • Related Report
      2016 Research-status Report
  • [Presentation] 6000系Al合金の湿潤大気中応力腐食割れ特性に及ぼす微小荷重変動の影響2016

    • Author(s)
      加藤俊輔,蓮沼将太, 小川 武史, 間野 覚文, 宮川 一夫
    • Organizer
      日本機械学会2016年度年次大会
    • Place of Presentation
      九州大学
    • Year and Date
      2016-09-12
    • Related Report
      2016 Research-status Report
  • [Presentation] Al-Mg-Si 系合金の湿潤大気中応力腐食割れの評価方法2016

    • Author(s)
      小川武史, 渡邉翔太, 川元裕介, 蓮沼将太
    • Organizer
      日本機械学会2016年度年次大会
    • Place of Presentation
      九州大学
    • Year and Date
      2016-09-12
    • Related Report
      2016 Research-status Report
  • [Remarks] 青山学院大学 研究者情報

    • URL

      http://raweb1.jm.aoyama.ac.jp/aguhp/KgApp?kyoinId=ymkbgmgmggy

    • Related Report
      2017 Annual Research Report

URL: 

Published: 2015-04-16   Modified: 2019-03-29  

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