Influences of plasticity-induced crack closure on fatigue crack healing of carbon steel with heat treatment

Eiichi Hamada, Yuto Furuya, Atsushi Hosoi, Yuji Morita, Hiroyuki Kawada

    研究成果: Conference contribution

    抜粋

    Healing technology for metallic materials is an important subject in terms of long-term reliability and durability of structural members, a healing technology to heal fatigue crack by applying heat treatment at annealing temperature level has been discovered. In this study, the influences of plasticity-induced crack closure on healing were evaluated by obtaining the crack opening load during the pre-crack introduction and evaluating the fatigue crack propagation characteristics before and after the healing heat treatment, using compact tension specimens made of carbon steel with different test conditions. As a result, the specimen with high crack opening load showed high healing effect and were able to heal up to 95% of the pre-crack length. This suggested that the residual compressive stress due to the plasticity-induced crack closure accelerates the solid-state diffusion bonding during the crack healing process and this leads to the improvement of the healing effect.

    元の言語English
    ホスト出版物のタイトルMaterials
    ホスト出版物のサブタイトルGenetics to Structures
    出版者American Society of Mechanical Engineers (ASME)
    12
    ISBN(電子版)9780791852170
    DOI
    出版物ステータスPublished - 2018 1 1
    イベントASME 2018 International Mechanical Engineering Congress and Exposition, IMECE 2018 - Pittsburgh, United States
    継続期間: 2018 11 92018 11 15

    Other

    OtherASME 2018 International Mechanical Engineering Congress and Exposition, IMECE 2018
    United States
    Pittsburgh
    期間18/11/918/11/15

    ASJC Scopus subject areas

    • Mechanical Engineering

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  • これを引用

    Hamada, E., Furuya, Y., Hosoi, A., Morita, Y., & Kawada, H. (2018). Influences of plasticity-induced crack closure on fatigue crack healing of carbon steel with heat treatment. : Materials: Genetics to Structures (巻 12). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/IMECE2018-86650