About: Fatigue crack initiation – The role of point defects

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The role of point defects in the formation of surface relief and in the initiation of a fatigue crack in crystalline materials is analyzed. The dislocation interactions in the bands of intensive cyclic slip (persistent slip bands – PSBs) are specified and relations describing the formation and annihilation of interstitial and vacancy type defects in the channels of the ladder-like PSB are derived. The continuous formation, annihilation and primarily the migration of point defects are proposed to be responsible for the mass redistribution within PSB and between PSB and the PSB/matrix boundary. The redistribution of the matter results in local tensile and compressive stresses that are the sources of the principal irreversibility of slip within PSB. Local tensile and compressive stresses are relaxed by dislocation movement within PSB in the direction of the active Burgers vector and lead to the formation of characteristic surface relief in the form of extrusions and intrusions. The intrusions represent crack-like defects and fatigue cracks initiate in the tip of intrusions. The role of point defects in the formation of surface relief and in the initiation of a fatigue crack in crystalline materials is analyzed. The dislocation interactions in the bands of intensive cyclic slip (persistent slip bands – PSBs) are specified and relations describing the formation and annihilation of interstitial and vacancy type defects in the channels of the ladder-like PSB are derived. The continuous formation, annihilation and primarily the migration of point defects are proposed to be responsible for the mass redistribution within PSB and between PSB and the PSB/matrix boundary. The redistribution of the matter results in local tensile and compressive stresses that are the sources of the principal irreversibility of slip within PSB. Local tensile and compressive stresses are relaxed by dislocation movement within PSB in the direction of the active Burgers vector and lead to the formation of characteristic surface relief in the form of extrusions and intrusions. The intrusions represent crack-like defects and fatigue cracks initiate in the tip of intrusions. (en)
Title	Fatigue crack initiation – The role of point defects Fatigue crack initiation – The role of point defects (en)
skos:prefLabel	Fatigue crack initiation – The role of point defects Fatigue crack initiation – The role of point defects (en)
skos:notation	RIV/68081723:_____/14:00432550!RIV15-GA0-68081723
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GA13-23652S), P(GAP108/10/2371)
http://linked.open...iv/cisloPeriodika	AUG
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Polák, Jaroslav Man, Jiří
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	16532
http://linked.open...ai/riv/idVysledku	RIV/68081723:_____/14:00432550
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Fatigue crack initiation; Point defects; Persistent slip band; Intrusion; Extrusion (en)
http://linked.open.../riv/klicoveSlovo	Intrusion Extrusion Point defects Persistent slip band Fatigue crack initiation
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[97B55BABF108]
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	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Localization and irreversibility of cyclic slip in polycrystals Materials for high temperature applications - hardening and damaging mechanisms
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	65
http://linked.open...iv/tvurceVysledku	Man, Jiří Polák, Jaroslav
http://linked.open...ain/vavai/riv/wos	000337554000004
issn	0142-1123
number of pages	10 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.ijfatigue.2013.10.016

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