• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Understanding initiation processes of stress corrosion cracking by means of real time imaging and development of anti-SCC materials

Research Project

Project/Area Number 22246092
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Material processing/treatments
Research InstitutionTohoku University

Principal Investigator

WATANABE Yutaka  東北大学, 大学院・工学研究科, 教授 (10260415)

Co-Investigator(Kenkyū-buntansha) TAKEDA Yoichi  東北大学, 大学院・工学研究科, 准教授 (40374970)
OIKAWA Katsunari  東北大学, 大学院・工学研究科, 准教授 (70356608)
ABE Hiroshi  東北大学, 大学院・工学研究科, 助教 (30540695)
MIYAZAKI Takamichi  東北大学, 大学院・工学研究科, 技術職員 (20422090)
Project Period (FY) 2010 – 2012
Project Status Completed (Fiscal Year 2012)
Budget Amount *help
¥34,060,000 (Direct Cost: ¥26,200,000、Indirect Cost: ¥7,860,000)
Fiscal Year 2012: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2011: ¥20,150,000 (Direct Cost: ¥15,500,000、Indirect Cost: ¥4,650,000)
Fiscal Year 2010: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
Keywords応力腐食割れ / 発生過程 / 視覚化 / すべり溶解機構 / 発色反応 / δフェライト / オーステナイト系ステンレス鋼 / き裂停留 / δ-フェライト / 電気化学的過渡信号 / 介在物 / すべり溶解 / 低ひずみ速度試験
Research Abstract

A visualization method has been developed, where local and transient anodic events occurring in initiation processes of stress corrosion cracking can be observed in a wide window and in real time. The initiation process was found to be intermittent and very small-scale anodic events and their repassivation. Cracks tend to initiate at the location where a few anodic events occur in proximity to each other. In most cases, oxide inclusions containing Si, Mg, or Al, provided initiation sites. Stress corrosion cracks tend to retard when they reach δ-ferrite located on grain boundaries (especially on triple points). We may be able to effectively improve SCC initiation life of steels by locatingδ-ferrite on grain boundaries as much as up to a few % of volume fraction.

Report

(4 results)
  • 2012 Annual Research Report   Final Research Report ( PDF )
  • 2011 Annual Research Report
  • 2010 Annual Research Report
  • Research Products

    (17 results)

All 2013 2012 2011 2010

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (14 results)

  • [Journal Article] Role of δ-ferrite in stress corrosion cracking retardation near fusion boundary of 316NG welds2012

    • Author(s)
      Hiroshi Abe, Yutaka Watanabe
    • Journal Title

      Journal of NuclearMaterials

      Volume: 424巻 Issue: 1-3 Pages: 57-61

    • DOI

      10.1016/j.jnucmat.2012.02.006

    • Related Report
      2012 Final Research Report 2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Electrochemical Evaluation of Radiation-Induced Segregation in Austenitic Stainless Steels with Oversize Solute Addition2012

    • Author(s)
      Parag M. Ahmedabadi, V. Kain, M.Gupta, I. Samajdar, S. Sharma, P. Bhagwat, and Y. Watanabe
    • Journal Title

      Journal of Materials Engineering and Performance

      Volume: 21巻 Issue: 11 Pages: 2472-2479

    • DOI

      10.1007/s11665-012-0201-8

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Electrochemical Evaluation of Radiation-Induced Segregation in Austenitic Stainless Steels with Oversize Solute Addition2012

    • Author(s)
      Parag M. Ahmedabadi, V. Kain, M. Gupta, I. Samajdar, S. Sharma, P. Bhagwat, and Y. Watanabe
    • Journal Title

      Journal of Materials Engineering and Performance

      Volume: Vol.21 Pages: 2472-2479

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Presentation] 視覚化手法を用いたSCC発生プロセスの観測とその特徴2013

    • Author(s)
      渡辺豊、阿部博志
    • Organizer
      腐食防食学会東北支部講演会
    • Place of Presentation
      仙台市
    • Year and Date
      2013-03-25
    • Related Report
      2012 Final Research Report
  • [Presentation] 視覚化手法を用いたSCC 発生プロセスの観測とその特徴2013

    • Author(s)
      渡辺 豊、阿部 博志
    • Organizer
      腐食防食学会東北支部講演会
    • Place of Presentation
      東北大学工学部 青葉記念会館5階 大会議室
    • Related Report
      2012 Annual Research Report
  • [Presentation] 鋭敏化ステンレス鋼のチオ硫酸ナトリウム水溶液中SCC発生過程における電位効果の視覚化観測2012

    • Author(s)
      岡田峻弥、阿部博志、渡辺豊
    • Organizer
      第59回材料と環境討論会、腐食防食学会
    • Place of Presentation
      旭川市
    • Year and Date
      2012-09-24
    • Related Report
      2012 Final Research Report
  • [Presentation] 視覚化手法による応力腐食割れ萌芽形成・発生過程の観測2012

    • Author(s)
      水落光、阿部博志、渡辺豊
    • Organizer
      腐食防食協会東北支部講演会
    • Place of Presentation
      盛岡市
    • Year and Date
      2012-03-02
    • Related Report
      2012 Final Research Report
  • [Presentation] 高温水中SCC抵抗性の高いステンレス鋼に関する研究2012

    • Author(s)
      水野峻、阿部博志、渡辺豊
    • Organizer
      腐食防食協会東北支部講演会
    • Place of Presentation
      盛岡市
    • Year and Date
      2012-03-02
    • Related Report
      2012 Final Research Report
  • [Presentation] 視覚化手法による応力腐食割れ萌芽形成・発生過程の観測2012

    • Author(s)
      水落光、阿部博志、渡辺豊
    • Organizer
      腐食防食協会東北支部講演会
    • Place of Presentation
      盛岡市産学官連携研究センター
    • Year and Date
      2012-03-02
    • Related Report
      2011 Annual Research Report
  • [Presentation] 高温水中SCC抵抗性の高いステンレス鋼に関する研究2012

    • Author(s)
      水野峻、阿部博志、渡辺豊
    • Organizer
      腐食防食協会東北支部講演会
    • Place of Presentation
      盛岡市産学官連携研究センター
    • Year and Date
      2012-03-02
    • Related Report
      2011 Annual Research Report
  • [Presentation] 鋭敏化ステンレス鋼のチオ硫酸ナトリウム水溶液中SCC 発生過程における電位効果の視覚化観測2012

    • Author(s)
      岡田峻弥, 阿部博志, 渡辺豊
    • Organizer
      第59回材料と環境討論会
    • Place of Presentation
      旭川市大雪クリスタルホール
    • Related Report
      2012 Annual Research Report
  • [Presentation] Ni基合金溶接金属/低合金鋼異材溶接部でのき裂停留/進展挙動に及ぼす材料側因子の検討2011

    • Author(s)
      阿部博志、渡辺豊、Mironov Sergey、佐藤裕、粉川博之
    • Organizer
      第58回材料と環境討論会、腐食防食協会
    • Place of Presentation
      名古屋市
    • Year and Date
      2011-09-28
    • Related Report
      2012 Final Research Report
  • [Presentation] Ni基合金溶接金属/低合金鋼異材溶接部でのき裂停留/進展挙動に及ぼす材料側因子の検討2011

    • Author(s)
      阿部博志、渡辺豊, 他
    • Organizer
      第58回材料と環境討論会
    • Place of Presentation
      名古屋大学東山キャンパス
    • Year and Date
      2011-09-28
    • Related Report
      2011 Annual Research Report
  • [Presentation] 視覚化手法を用いたSCCき裂萌芽形成における材料側因子の評価2011

    • Author(s)
      岡田俊弥、渡辺豊、阿部博志
    • Organizer
      日本機械学会東北学生会第41回学生員卒業研究発表講演会
    • Place of Presentation
      盛岡市
    • Year and Date
      2011-03-03
    • Related Report
      2012 Final Research Report
  • [Presentation] 視覚化手法を用いたSCCき裂萌芽形成における材料側因子の評価2011

    • Author(s)
      岡田俊弥、渡辺豊、阿部博志
    • Organizer
      日本機械学会東北学生会第41回学生員卒業研究発表講演会
    • Place of Presentation
      盛岡
    • Year and Date
      2011-03-03
    • Related Report
      2010 Annual Research Report
  • [Presentation] Potential Importance of Microstructural Aspects for Better Understanding of SCC Behaviors in Stainless Steels2010

    • Author(s)
      Yutaka Watanabe, Hiroshi Abe
    • Organizer
      International Seminar on Maintenance Science and Technology for Nuclear Power Plant
    • Place of Presentation
      仙台市
    • Year and Date
      2010-11-03
    • Related Report
      2012 Final Research Report
  • [Presentation] Potential Importance of Microstructural Aspects for Better Understanding of SCC Behaviors in Stainless Steels2010

    • Author(s)
      Yutaka Watanabe, Hiroshi Abe
    • Organizer
      International Seminar on Maintenance Science and Technology for Nuclear Power Plant
    • Place of Presentation
      Sendai
    • Year and Date
      2010-11-03
    • Related Report
      2010 Annual Research Report

URL: 

Published: 2010-08-23   Modified: 2019-07-29  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi