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

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    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.

    Original languageEnglish
    Title of host publicationMaterials
    Subtitle of host publicationGenetics to Structures
    PublisherAmerican Society of Mechanical Engineers (ASME)
    Volume12
    ISBN (Electronic)9780791852170
    DOIs
    Publication statusPublished - 2018 Jan 1
    EventASME 2018 International Mechanical Engineering Congress and Exposition, IMECE 2018 - Pittsburgh, United States
    Duration: 2018 Nov 92018 Nov 15

    Other

    OtherASME 2018 International Mechanical Engineering Congress and Exposition, IMECE 2018
    CountryUnited States
    CityPittsburgh
    Period18/11/918/11/15

    ASJC Scopus subject areas

    • Mechanical Engineering

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  • Cite this

    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. In Materials: Genetics to Structures (Vol. 12). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/IMECE2018-86650