About: Microstructure Mechanisms Governing the Creep Life of Ultrafine-grained Cu-0.2wt.%Zr Alloy

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Equal-channel angular pressing (ECAP) was conducted at room temperature and extrusion passes were processed by route Bc up to 12 passes. Tensile creep tests were performed at 473 K, 573 K and 673 K at different constant applied stresses. It was observed that the original coarse grain size of unprocessed alloy was reduced to 0.3 µm after 8 ECAP passes and the grain growth during creep was restricted by precipitates with the mean diameter 4.0 nm. No significant effect on creep resistance was found after one ECAP pass at 473 and 573 K. However, the longest time to fracture was exhibited by alloy after 2 ECAP passes at 573 and 673 K but with further increasing number of ECAP passes a decrease in the time to fracture was observed. Nevertheless, the beneficial effect of ECAP on creep resistance was still documented after 8 passes for temperatures of 473 and 573 K. By contrast, creep tests performed at 673 K showed that the time to fracture of UFG material is shorter as compared with that for as-received state. The 3 D laser measurement of surface showed that the creep fracture process is accelerated by formation of vertical surface step relief and cavitation at the intersection of the shear bands during creep. Equal-channel angular pressing (ECAP) was conducted at room temperature and extrusion passes were processed by route Bc up to 12 passes. Tensile creep tests were performed at 473 K, 573 K and 673 K at different constant applied stresses. It was observed that the original coarse grain size of unprocessed alloy was reduced to 0.3 µm after 8 ECAP passes and the grain growth during creep was restricted by precipitates with the mean diameter 4.0 nm. No significant effect on creep resistance was found after one ECAP pass at 473 and 573 K. However, the longest time to fracture was exhibited by alloy after 2 ECAP passes at 573 and 673 K but with further increasing number of ECAP passes a decrease in the time to fracture was observed. Nevertheless, the beneficial effect of ECAP on creep resistance was still documented after 8 passes for temperatures of 473 and 573 K. By contrast, creep tests performed at 673 K showed that the time to fracture of UFG material is shorter as compared with that for as-received state. The 3 D laser measurement of surface showed that the creep fracture process is accelerated by formation of vertical surface step relief and cavitation at the intersection of the shear bands during creep. (en)
Title	Microstructure Mechanisms Governing the Creep Life of Ultrafine-grained Cu-0.2wt.%Zr Alloy Microstructure Mechanisms Governing the Creep Life of Ultrafine-grained Cu-0.2wt.%Zr Alloy (en)
skos:prefLabel	Microstructure Mechanisms Governing the Creep Life of Ultrafine-grained Cu-0.2wt.%Zr Alloy Microstructure Mechanisms Governing the Creep Life of Ultrafine-grained Cu-0.2wt.%Zr Alloy (en)
skos:notation	RIV/68081723:_____/12:00385908!RIV13-GA0-68081723
http://linked.open...avai/predkladatel	Ústav fyziky materiálů AVČR, v.v.i.
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GAP108/11/2260), Z(AV0Z20410507)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Kvapilová, Marie Svoboda, Milan Sklenička, Václav Dvořák, Jiří Král, Petr
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	150435
http://linked.open...ai/riv/idVysledku	RIV/68081723:_____/12:00385908
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	equal-channel angular pressing; creep behaviour; ultrafine-grained materials (en)
http://linked.open.../riv/klicoveSlovo	creep behaviour equal-channel angular pressing ultrafine-grained materials
http://linked.open...odStatuVydavatele	PL - Polská republika
http://linked.open...ontrolniKodProRIV	[7AE3AD37EC4A]
http://linked.open...i/riv/nazevZdroje	Acta Physica Polonica. A
http://linked.open...in/vavai/riv/obor	JJ
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	The link between microstructure and creep behaviour of precipitate strengthened alloys processed by ECAP
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	122
http://linked.open...iv/tvurceVysledku	Dvořák, Jiří Král, Petr Kvapilová, Marie Sklenička, Václav Svoboda, Milan
http://linked.open...ain/vavai/riv/wos	000309019200009
http://linked.open...n/vavai/riv/zamer	Physical properties of advanced materials in relation to their microstructure and processing
issn	0587-4246
number of pages	4 (xsd:int)
is http://linked.open...avai/riv/vysledek of	Microstructure Mechanisms Governing the Creep Life of Ultrafine-grained Cu-0.2wt.%Zr Alloy

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