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Fatigue crack initiation and growth in 316L steel in torsional cyclic loading

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    0494057 - ÚFM 2019 RIV CZ eng C - Conference Paper (international conference)
    Karol, Michal - Chlupová, Alice - Mazánová, Veronika - Kruml, Tomáš
    Fatigue crack initiation and growth in 316L steel in torsional cyclic loading.
    Engineering Mechanics 2017 : 23rd international conference : May 15-18, 2017, Svratka, Czech Republic : book of full texts. Brno: University of Technology, Institute of Solid Mechanics, Mechatronics and Biomechanics, 2017 - (Fuis, V.), s. 434-437. ISBN 978-80-214-5497-2.
    [Engineering Mechanics 2017 - International Conference /23./. Svratka (CZ), 15.05.2017-18.05.2017]
    R&D Projects: GA MŠk LM2015069; GA ČR GA15-08826S
    Institutional support: RVO:68081723
    Keywords : 316L austenitic steel * fatigue crack initiation * Crack growth * Torsional loading * Crack path
    Subject RIV: JG - Metallurgy
    OBOR OECD: Materials engineering

    Fatigue crack initiation and growth study in 316L austenitic stainless steel was made in cyclic
    torsion. The experiments on hollow cylindrical specimens were performed at room temperature using fully reversed shear strain controlled cycles. The specimens used were polished mechanically and electrolytically to enable surface damage and crack propagation observation using optical light microscope, SEM. It was found that high density of extrusions and intrusions are formed on the specimen surface due to cyclic loading. TEM observations revealed that dislocation arrangement in well-known ladder-like structure is responsible for the localization of cyclic plastic deformation and for the origin of surface roughness in which the fatigue crack nucleate. The path of fatigue cracks leading to failure was observed, too. The crack path
    was found to be dependent upon the applied shear strain amplitude.
    Permanent Link: http://hdl.handle.net/11104/0289464
     
Number of the records: 1