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Statements

Subject Item
n2:RIV%2F68081723%3A_____%2F14%3A00435683%21RIV15-GA0-68081723
rdf:type
skos:Concept n14:Vysledek
dcterms:description
This work describes the effect of ECAP technique on the microstructure and creep properties of pure Cu and its alloys with addition of Zr or Co. The ECAP pressing was performed at room temperature by route Bc up to 12 passes. Ultrafine-grained (UFG) microstructure has been studied by methods of TEM and SEM-EBSD. Tensile creep tests were conducted at temperature 673 K and at different applied stresses on ECAP material and, for comparison purposes, on unpressed coarse-grained (CG) states. It was found that both alloys processed by ECAP exhibited similar character of creep behaviour. Creep resistance was markedly improved after first two ECAP passes in comparison with its unpressed state. The minimum creep rate of ECAP material may be up to two orders of magnitude lower than that of CG material. However, subsequent ECAP passes lead to a decline of creep life and the difference in the minimum creep rate for the ECAP material and CG state consistently decreases with increasing number of ECAP passes. Further, ECAP process led to significant improvements in fracture strain. The link between microstructural processes and creep behaviour of pressed Cu and its selected alloys is examined in detail. This work describes the effect of ECAP technique on the microstructure and creep properties of pure Cu and its alloys with addition of Zr or Co. The ECAP pressing was performed at room temperature by route Bc up to 12 passes. Ultrafine-grained (UFG) microstructure has been studied by methods of TEM and SEM-EBSD. Tensile creep tests were conducted at temperature 673 K and at different applied stresses on ECAP material and, for comparison purposes, on unpressed coarse-grained (CG) states. It was found that both alloys processed by ECAP exhibited similar character of creep behaviour. Creep resistance was markedly improved after first two ECAP passes in comparison with its unpressed state. The minimum creep rate of ECAP material may be up to two orders of magnitude lower than that of CG material. However, subsequent ECAP passes lead to a decline of creep life and the difference in the minimum creep rate for the ECAP material and CG state consistently decreases with increasing number of ECAP passes. Further, ECAP process led to significant improvements in fracture strain. The link between microstructural processes and creep behaviour of pressed Cu and its selected alloys is examined in detail.
dcterms:title
Enhanced creep properties of copper and its alloys processed by ECAP Enhanced creep properties of copper and its alloys processed by ECAP
skos:prefLabel
Enhanced creep properties of copper and its alloys processed by ECAP Enhanced creep properties of copper and its alloys processed by ECAP
skos:notation
RIV/68081723:_____/14:00435683!RIV15-GA0-68081723
n3:aktivita
n20:P n20:I
n3:aktivity
I, P(ED1.1.00/02.0068), P(GAP108/11/2260)
n3:dodaniDat
n15:2015
n3:domaciTvurceVysledku
n8:1102303 n8:8144036 n8:7024819 n8:8093326 n8:7393776
n3:druhVysledku
n17:D
n3:duvernostUdaju
n4:S
n3:entitaPredkladatele
n12:predkladatel
n3:idSjednocenehoVysledku
14663
n3:idVysledku
RIV/68081723:_____/14:00435683
n3:jazykVysledku
n18:eng
n3:klicovaSlova
Copper alloys; Creep; Microstructure; UFG materials
n3:klicoveSlovo
n5:Creep n5:Copper%20alloys n5:Microstructure n5:UFG%20materials
n3:kontrolniKodProRIV
[F38B81BB6F56]
n3:mistoKonaniAkce
Metz
n3:mistoVydani
Bristol
n3:nazevZdroje
NANOSPD 6
n3:obor
n11:JJ
n3:pocetDomacichTvurcuVysledku
5
n3:pocetTvurcuVysledku
5
n3:projekt
n19:GAP108%2F11%2F2260 n19:ED1.1.00%2F02.0068
n3:rokUplatneniVysledku
n15:2014
n3:tvurceVysledku
Sklenička, Václav Svoboda, Milan Kvapilová, Marie Dvořák, Jiří Král, Petr
n3:typAkce
n16:WRD
n3:wos
000347246200142
n3:zahajeniAkce
2014-06-30+02:00
s:issn
1757-8981
s:numberOfPages
8
n7:doi
10.1088/1757-899X/63/1/012141
n10:hasPublisher
IOP Publishing Ltd