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Fatigue mechanisms in ultrafine-grained copper
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SYSNO ASEP 0323191 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Fatigue mechanisms in ultrafine-grained copper Title Únavové mechanizmy v ultrajemnozrnné mědi Author(s) Lukáš, Petr (UFM-A)
Kunz, Ludvík (UFM-A) RID, ORCID
Svoboda, Milan (UFM-A) RID, ORCIDSource Title Kovové materiály. - : Ústav fyziky materiálu AV ČR, v. v. i. - : Ústav materiálov a mechaniky strojov SAV. - : Ústav materiálového výskumu SAV. - : Strojnícka fakulta STU - ISSN 0023-432X
Roč. 47, č. 1 (2009), s. 1-9Number of pages 9 s. Language eng - English Country SK - Slovakia Keywords ultrafine-grained copper ; effect of purity ; effect of temperature Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects 1QS200410502 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z20410507 - UFM-A (2005-2011) Annotation Fatigue behaviour of UFG copper depends on temperature and purity. The temperature dependence for UFG copper is weaker than that for CG copper. The effect of purity is strong for low stress amplitudes (HCF region) and negligible for high stress amplitudes (LCF region). The activity of two concurrent mechanisms of cyclic plastic deformation is considered to be responsible for the observed phenomena: (i) bulk mechanism consisting of irreversible movement of dislocations and (ii) surface mechanism operating in the surface layer consisting of GB sliding along the shear plane of the last ECAP pass. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2009
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