About: Effect of equal channel angular pressing on the Portevin-Le Chatelier effect in an Al3Mg alloy

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About: Effect of equal channel angular pressing on the Portevin-Le Chatelier effect in an Al3Mg alloy Goto Sponge NotDistinct Permalink

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Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1016/j.msea.2014.07.064
Description	Plastic deformation of alloys is often accompanied with discontinuous flow known as the Portevin-Le Chatelier (PLC) instability. Recent studies of mechanical behavior of alloys subjected to severe plastic deformation (SPD) revealed different forms this phenomenon can take as a result of grain refinement. In the present work, it is reported that SPD may effectively suppress the macroscopic stress serrations characteristic of the PLC effect. At the same time, small-scale stress fluctuations can still be resolved on the deformation curves. To investigate their nature, stress vs time curves for an Al3Mg alloy processed by equal channel angular pressing (ECAP) are compared with those obtained for the initial coarse-grained (CG) material, using statistical and multifractal approaches to multi-scale analysis of time series. An interpretation of the results in terms of the concurrency of phenomena of self-organized criticality and synchronization in the dislocation system is proposed. (C) 2014 Elsevier B.V. All rights reserved. Plastic deformation of alloys is often accompanied with discontinuous flow known as the Portevin-Le Chatelier (PLC) instability. Recent studies of mechanical behavior of alloys subjected to severe plastic deformation (SPD) revealed different forms this phenomenon can take as a result of grain refinement. In the present work, it is reported that SPD may effectively suppress the macroscopic stress serrations characteristic of the PLC effect. At the same time, small-scale stress fluctuations can still be resolved on the deformation curves. To investigate their nature, stress vs time curves for an Al3Mg alloy processed by equal channel angular pressing (ECAP) are compared with those obtained for the initial coarse-grained (CG) material, using statistical and multifractal approaches to multi-scale analysis of time series. An interpretation of the results in terms of the concurrency of phenomena of self-organized criticality and synchronization in the dislocation system is proposed. (C) 2014 Elsevier B.V. All rights reserved. (en)
Title	Effect of equal channel angular pressing on the Portevin-Le Chatelier effect in an Al3Mg alloy Effect of equal channel angular pressing on the Portevin-Le Chatelier effect in an Al3Mg alloy (en)
skos:prefLabel	Effect of equal channel angular pressing on the Portevin-Le Chatelier effect in an Al3Mg alloy Effect of equal channel angular pressing on the Portevin-Le Chatelier effect in an Al3Mg alloy (en)
skos:notation	RIV/00216208:11320/14:10286573!RIV15-GA0-11320___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(GB14-36566G)
http://linked.open...iv/cisloPeriodika	-
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Janeček, Miloš
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	13254
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/14:10286573
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Self-organization; Statistical analysis; Jerky flow; Equal channel angular pressing; Aluminum alloys; Mechanical characterization (en)
http://linked.open.../riv/klicoveSlovo	Jerky flow Self-organization Aluminum alloys Mechanical characterization Statistical analysis Equal channel angular pressing
http://linked.open...odStatuVydavatele	CH - Švýcarská konfederace
http://linked.open...ontrolniKodProRIV	[275F9AF8B054]
http://linked.open...i/riv/nazevZdroje	Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Multidisciplinary research centre for advanced materials
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	615
http://linked.open...iv/tvurceVysledku	Janeček, Miloš Lebedkina, T. A. Lebyodkin, M. A. Estrin, Y. Lamark, T. T.
http://linked.open...ain/vavai/riv/wos	000343336400002
issn	0921-5093
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.msea.2014.07.064
http://localhost/t...ganizacniJednotka	11320

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