About: Initiation of fatigue cracks in AZ91 Mg alloy processed by ECAP

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Mechanism of fatigue crack initiation was investigated in ultrafine-grained (UFG) magnesium alloy AZ91 processed by equal channel angular pressing (ECAP). Fatigue behaviour of UFG material was compared to the behaviour of material in an initial as-cast state. Focused ion beam technique (FIB) was applied to reveal the surface relief and early fatigue cracks. Two substantially different mechanisms of crack initiation were observed in UFG structure, which can be characterized as bimodal even after 6 ECAP passes by route Bc. The bimodality consists in a coexistence of very fine grained areas with higher content of Mg17Al12 particles and areas exhibiting somewhat larger grains and lower density of particles. The fatigue cracks which initiate in areas of larger grains are related to the cyclic slip bands; this initiation mechanism is similar to that observed in cast alloy. The second initiation mechanism is related to the grain boundary cracking which takes place predominantly in the fine grained areas. Mechanism of fatigue crack initiation was investigated in ultrafine-grained (UFG) magnesium alloy AZ91 processed by equal channel angular pressing (ECAP). Fatigue behaviour of UFG material was compared to the behaviour of material in an initial as-cast state. Focused ion beam technique (FIB) was applied to reveal the surface relief and early fatigue cracks. Two substantially different mechanisms of crack initiation were observed in UFG structure, which can be characterized as bimodal even after 6 ECAP passes by route Bc. The bimodality consists in a coexistence of very fine grained areas with higher content of Mg17Al12 particles and areas exhibiting somewhat larger grains and lower density of particles. The fatigue cracks which initiate in areas of larger grains are related to the cyclic slip bands; this initiation mechanism is similar to that observed in cast alloy. The second initiation mechanism is related to the grain boundary cracking which takes place predominantly in the fine grained areas. (en)
Title	Initiation of fatigue cracks in AZ91 Mg alloy processed by ECAP Initiation of fatigue cracks in AZ91 Mg alloy processed by ECAP (en)
skos:prefLabel	Initiation of fatigue cracks in AZ91 Mg alloy processed by ECAP Initiation of fatigue cracks in AZ91 Mg alloy processed by ECAP (en)
skos:notation	RIV/00216305:26620/14:PU111323!RIV15-MSM-26620___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(EE2.3.30.0039)
http://linked.open...iv/cisloPeriodika	8
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Fintová, Stanislava
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	Vysoké učení technické v Brně / Středoevropský technologický institut
http://linked.open...dnocenehoVysledku	21872
http://linked.open...ai/riv/idVysledku	RIV/00216305:26620/14:PU111323
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	fatigue crack initiation, fatigue, AZ91 magnesium alloy (en)
http://linked.open.../riv/klicoveSlovo	AZ91 magnesium alloy fatigue fatigue crack initiation
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[607632F25964]
http://linked.open...i/riv/nazevZdroje	IOP Conference Series: Materials Science and Engineering
http://linked.open...in/vavai/riv/obor	JL
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Excellent young researcher at BUT
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	63
http://linked.open...iv/tvurceVysledku	Kunz, Ludvík Fintová, Stanislava
issn	1757-8981
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.1088/1757-899X/63/1/012159
http://localhost/t...ganizacniJednotka	26620

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