About: An ultrasonic internal friction study of ultrafine-grained AZ31 magnesium alloy

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About: An ultrasonic internal friction study of ultrafine-grained AZ31 magnesium alloy Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1007/s10853-014-8641-1
Description	Internal friction in ultrafine-grained AZ31 magnesium alloy is investigated by resonant ultrasound spectroscopy. It is shown that the internal friction significantly increases at elevated temperatures (greater than or similar to 100 degrees C), and that this increase can be attributed to grain boundary sliding (GBS). The evolution of this phenomenon with grain refinement is studied by comparing the results obtained for an extruded material and for materials after additional one, two, and four passes of equal channel angular pressing. It is observed that the activation energy for diffusive GBS significantly decreases with decreasing grain size, and so does also the threshold temperature above which this internal friction mechanism is dominant. The results prove that the ultrafine-grained AZ31 alloys exhibit diffusive GBS at temperatures close to the ambient temperature, which is an interesting finding with respect to the possible applications of these alloys in superplastic forming technologies. Internal friction in ultrafine-grained AZ31 magnesium alloy is investigated by resonant ultrasound spectroscopy. It is shown that the internal friction significantly increases at elevated temperatures (greater than or similar to 100 degrees C), and that this increase can be attributed to grain boundary sliding (GBS). The evolution of this phenomenon with grain refinement is studied by comparing the results obtained for an extruded material and for materials after additional one, two, and four passes of equal channel angular pressing. It is observed that the activation energy for diffusive GBS significantly decreases with decreasing grain size, and so does also the threshold temperature above which this internal friction mechanism is dominant. The results prove that the ultrafine-grained AZ31 alloys exhibit diffusive GBS at temperatures close to the ambient temperature, which is an interesting finding with respect to the possible applications of these alloys in superplastic forming technologies. (en)
Title	An ultrasonic internal friction study of ultrafine-grained AZ31 magnesium alloy An ultrasonic internal friction study of ultrafine-grained AZ31 magnesium alloy (en)
skos:prefLabel	An ultrasonic internal friction study of ultrafine-grained AZ31 magnesium alloy An ultrasonic internal friction study of ultrafine-grained AZ31 magnesium alloy (en)
skos:notation	RIV/00216208:11320/14:10287618!RIV15-MSM-11320___
http://linked.open...avai/riv/aktivita	I P S
http://linked.open...avai/riv/aktivity	I, P(GA13-13616S), S
http://linked.open...iv/cisloPeriodika	2
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Janeček, Miloš Vrátná, Jitka
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	Univerzita Karlova v Praze / Matematicko-fyzikální fakulta
http://linked.open...dnocenehoVysledku	26
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/14:10287618
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	superplasticity; refinement; ecap; spectroscopy; pure mg; mg alloys; heat-treatment; elastic-moduli; room-temperature; severe plastic-deformation (en)
http://linked.open.../riv/klicoveSlovo	refinement heat-treatment ecap superplasticity spectroscopy elastic-moduli mg alloys pure mg severe plastic-deformation room-temperature
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[6229E5ABF803]
http://linked.open...i/riv/nazevZdroje	Journal of Materials Science
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Evaluation of Elastic Properties of Materials Processed by Severe Plastic Deformation
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	50
http://linked.open...iv/tvurceVysledku	Janeček, Miloš Landa, Michal Sedlák, Petr Koller, Martin Stráská, Jitka Seiner, Hanus Sevcik, Martin
http://linked.open...ain/vavai/riv/wos	000345407900032
issn	0022-2461
number of pages	11 (xsd:int)
http://bibframe.org/vocab/doi	10.1007/s10853-014-8641-1
http://localhost/t...ganizacniJednotka	11320

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