About: Strain localization and fatigue crack initiation in ultrafine-grained copper in high- and giga-cycle region

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About: Strain localization and fatigue crack initiation in ultrafine-grained copper in high- and giga-cycle region Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Initiation of fatigue cracks and early crack propagation in high-cycle and giga-cycle region in ultrafine-grained copper prepared by equal channel angular pressing was experimentally investigated. The cyclic slip localization takes place in cyclic slip bands whose length substantially exceeds the grain size. The mechanism of the crack initiation under load controlled cycling does not require the dynamic grain coarsening often indicated in literature. Fatigue cracks initiate in slip bands, which develop predominantly in zones of near-by oriented grains. The damage mechanism consists in localized slip resulting in development of cavities and voids arranged along the planes of highest cyclic shear stress and in formation of surface relief. A process of growth and linking of cavities and voids produced by the irreversible cyclic slip by dislocation movement generating point defects governs the early stage of the development of fatigue cracks. Sufficiently large cracks created by this mechanism and lying in suitably oriented long slip bands finally transform into fatigue cracks propagating by common opening mode with a plastic zone generated at their tip. 2013 Elsevier Ltd. All rights reserved. Initiation of fatigue cracks and early crack propagation in high-cycle and giga-cycle region in ultrafine-grained copper prepared by equal channel angular pressing was experimentally investigated. The cyclic slip localization takes place in cyclic slip bands whose length substantially exceeds the grain size. The mechanism of the crack initiation under load controlled cycling does not require the dynamic grain coarsening often indicated in literature. Fatigue cracks initiate in slip bands, which develop predominantly in zones of near-by oriented grains. The damage mechanism consists in localized slip resulting in development of cavities and voids arranged along the planes of highest cyclic shear stress and in formation of surface relief. A process of growth and linking of cavities and voids produced by the irreversible cyclic slip by dislocation movement generating point defects governs the early stage of the development of fatigue cracks. Sufficiently large cracks created by this mechanism and lying in suitably oriented long slip bands finally transform into fatigue cracks propagating by common opening mode with a plastic zone generated at their tip. 2013 Elsevier Ltd. All rights reserved. (en)
Title	Strain localization and fatigue crack initiation in ultrafine-grained copper in high- and giga-cycle region Strain localization and fatigue crack initiation in ultrafine-grained copper in high- and giga-cycle region (en)
skos:prefLabel	Strain localization and fatigue crack initiation in ultrafine-grained copper in high- and giga-cycle region Strain localization and fatigue crack initiation in ultrafine-grained copper in high- and giga-cycle region (en)
skos:notation	RIV/68081723:_____/14:00434886!RIV15-GA0-68081723
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(ED1.1.00/02.0068), P(GAP108/10/2001)
http://linked.open...iv/cisloPeriodika	JAN
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Kunz, Ludvík Lukáš, Petr
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky materiálů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	47594
http://linked.open...ai/riv/idVysledku	RIV/68081723:_____/14:00434886
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Fatigue crack initiation; Strain localization; Stability of ultrafine-grained structure; UFG Cu (en)
http://linked.open.../riv/klicoveSlovo	Strain localization UFG Cu Stability of ultrafine-grained structure Fatigue crack initiation
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[4002E7EBAC40]
http://linked.open...i/riv/nazevZdroje	International Journal of Fatigue
http://linked.open...in/vavai/riv/obor	JL
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Central european institute of technology Cyclic plastic deformation and fatigue performance of ultrafine-grained materials
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	58
http://linked.open...iv/tvurceVysledku	Kunz, Ludvík Lukáš, Petr Navrátilová, L.
http://linked.open...ain/vavai/riv/wos	000328592700024
issn	0142-1123
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.ijfatigue.2013.04.027

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