Original title: Fatigue crack initiation in fcc crystals
Authors: Lukáš, Petr ; Kunz, Ludvík
Document type: Papers
Conference/Event: International Conference on Materials structure and Micromechanics of Fracture /3./, Brno (CZ), 2001-06-27 / 2001-06-29
Year: 2001
Language: eng
Abstract: Initiation of fatigue cracks both in model fcc single crystals and in fcc single crystals used in engineering practice is discussed. The emphasis is placed on the role of different types of cyclic slip localisation. It is shown that the phenomenon of persistent slip bands (PSBs) is confined to single crystals of sufficiently high stacking fault energy cycled at a relatively narrow range of loading conditions. For single crystals of not suitable orientations and/or of low stacking fault energy cycled under stresses and/or strains outside the critical range and/or under high temperatures the cyclic plasticity manifests itself by other forms of slip activity leading to the formation of surface hill-valley topography.
Keywords: crystal defects; cyclic plastic deformation; fatigue crack initiation
Project no.: CEZ:AV0Z2041904 (CEP), IAA2041002 (CEP)
Funding provider: GA AV ČR
Host item entry: Materials Structure and Micromechanisms of Fracture

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/11104/0074627

Permalink: http://www.nusl.cz/ntk/nusl-26488


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Research > Institutes ASCR > Institute of Physics of Materials
Conference materials > Papers