Original title: Fatigue crack initiation and growth in 316L steel in torsional cyclic loading
Authors: Karol, Michal ; Chlupová, Alice ; Mazánová, Veronika ; Kruml, Tomáš
Document type: Papers
Conference/Event: Engineering Mechanics 2017 - International Conference /23./, Svratka (CZ), 20170515
Year: 2017
Language: eng
Abstract: Fatigue crack initiation and growth study in 316L austenitic stainless steel was made in cyclic\ntorsion. 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\nwas found to be dependent upon the applied shear strain amplitude.
Keywords: 316L austenitic steel; Crack growth; Crack path; fatigue crack initiation; Torsional loading
Project no.: LM2015069 (CEP), GA15-08826S (CEP)
Funding provider: GA MŠk, GA ČR
Host item entry: Engineering Mechanics 2017 : 23rd international conference : May 15-18, 2017, Svratka, Czech Republic : book of full texts, ISBN 978-80-214-5497-2

Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0289464

Permalink: http://www.nusl.cz/ntk/nusl-390651


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