Original title: Micro-plastic limit of low-carbon steel CSN 41 1375 as determined by the measurement of electrical impedance
Authors: Gajdoš, Lubomír ; Šperl, Martin ; Kaiser, J. ; Mentl, V.
Document type: Papers
Conference/Event: Zvyšování životnosti komponent energetických zařízení v elektrárnách /8./, Srní (CZ), 2013-10-22 / 2013-10-24
Year: 2013
Language: eng
Abstract: It is generally accepted that not all cyclic stresses below the fatigue limit are non-damaging. Particularly in spectrum loading, the inclusion of some cyclic stresses below the fatigue limi can reduce the fatigue life of a component. It is believed that the boundary between damaging and non-damaging stresses is the so-called micro-plastic limit (MPL) defined as a macro-stress at which dislocation pile-up stresses begin to obstruct the magnetic domains in rotation to the direction of the tensile stress. This paper shows that MPL can be determined from changes in magnetic permeability during tensile loading. In our work, changes in magnetic permeability were measured indirectly - by measuring changes in electrical impedance (a.c. resistence and induktance). Measurements were performed on normalized low-C steel CSN 411375, and the microplastic limit was determined by evaluating
Keywords: damage; fatigue; microplastic limit
Project no.: GAP105/10/2052 (CEP)
Funding provider: GA ČR
Host item entry: Zvyšování životnosti komponent energetických zařízení v elektrárnách. Sborník z 8. konference, ISBN 978-80-261-0272-4
Note: Související webová stránka: http://www.itam.cas.cz/?pid=5

Institution: Institute of Theoretical and Applied Mechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0226242

Permalink: http://www.nusl.cz/ntk/nusl-161500


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Research > Institutes ASCR > Institute of Theoretical and Applied Mechanics
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