About: Effect of microstructure on creep behaviour of cast Mg97Y2Zn1 (at.%) alloy

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About: Effect of microstructure on creep behaviour of cast Mg97Y2Zn1 (at.%) alloy Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The creep resistance of the Mg97Y2Zn1 (at.%) alloy in the as-cast condition and after a isochronal thermal treatment up to 560 C is evaluated from 200 C to 350 C. The as-cast alloy shows a microstructure characterized bymagnesiumdendrites and a Long-Period Stacking Ordered Structure in the interdendritic regions. The heat treated alloy shows a fully lamellar structure within magnesium grains. In both cases, the stress dependence of the creep rate presents two different regions. For low temperature and/or high strain rates, the creep behaviour shows a high stress exponent (n = 11) and high activation energy. The alloy behaves as a metal matrix composite where the magnesium matrix transfers part of its load to the LPSO-phase. Moreover, the lamellar structure within the magnesium grains in the thermal treated alloy results in an additional barrier against creep deformation. At high temperature and/or low strain rates, creep is controlled by non-basal dislocation slip. The cast alloy showed higher creep resistance than the heat treated alloy at low stresses since the diffusion of Zn and Y atoms nucleate at Shockley partial dislocations inhibiting their movements. The creep resistance of the Mg97Y2Zn1 (at.%) alloy in the as-cast condition and after a isochronal thermal treatment up to 560 C is evaluated from 200 C to 350 C. The as-cast alloy shows a microstructure characterized bymagnesiumdendrites and a Long-Period Stacking Ordered Structure in the interdendritic regions. The heat treated alloy shows a fully lamellar structure within magnesium grains. In both cases, the stress dependence of the creep rate presents two different regions. For low temperature and/or high strain rates, the creep behaviour shows a high stress exponent (n = 11) and high activation energy. The alloy behaves as a metal matrix composite where the magnesium matrix transfers part of its load to the LPSO-phase. Moreover, the lamellar structure within the magnesium grains in the thermal treated alloy results in an additional barrier against creep deformation. At high temperature and/or low strain rates, creep is controlled by non-basal dislocation slip. The cast alloy showed higher creep resistance than the heat treated alloy at low stresses since the diffusion of Zn and Y atoms nucleate at Shockley partial dislocations inhibiting their movements. (en)
Title	Effect of microstructure on creep behaviour of cast Mg97Y2Zn1 (at.%) alloy Effect of microstructure on creep behaviour of cast Mg97Y2Zn1 (at.%) alloy (en)
skos:prefLabel	Effect of microstructure on creep behaviour of cast Mg97Y2Zn1 (at.%) alloy Effect of microstructure on creep behaviour of cast Mg97Y2Zn1 (at.%) alloy (en)
skos:notation	RIV/68081723:_____/12:00385500!RIV13-AV0-68081723
http://linked.open...avai/riv/aktivita	I
http://linked.open...avai/riv/aktivity	I
http://linked.open...iv/cisloPeriodika	MARCH
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Dobeš, Ferdinand
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	133149
http://linked.open...ai/riv/idVysledku	RIV/68081723:_____/12:00385500
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Mechanical characterization; Magnesium alloys; Casting; Creep (en)
http://linked.open.../riv/klicoveSlovo	Casting Magnesium alloys Creep Mechanical characterization
http://linked.open...odStatuVydavatele	CH - Švýcarská konfederace
http://linked.open...ontrolniKodProRIV	[ABACD5214B12]
http://linked.open...i/riv/nazevZdroje	Materials Science and Engineering A-Structural materials
http://linked.open...in/vavai/riv/obor	JI
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	539
http://linked.open...iv/tvurceVysledku	Dobeš, Ferdinand Adeva, P. Antoranz, J. M. Garcés, G. Onorbe, E. Pérez, P.
http://linked.open...ain/vavai/riv/wos	000302047300008
issn	0921-5093
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.msea.2012.01.023

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