Detail publikace
Strukturní stabilita ultrajemnozrrné mědi při únavovém zatěžování
KUNZ, L. LUKÁŠ, P. PANTĚLEJEV, L. MAN, O.
Český název
Strukturní stabilita ultrajemnozrrné mědi při únavovém zatěžování
Anglický název
Stability of ultrafine-grained structure of copper under fatigue loading
Typ
článek v časopise - ostatní, Jost
Jazyk
en
Originální abstrakt
Stability of microstructure of ultrafine-grained materials under cyclic loading is a crucial condition for their good fatigue performance. Changes of microstructure due to fatigue in bulk, localization of cyclic plasticity into cyclic slip bands and related development of microstructure were experimentally studied on ultrafine-grained copper prepared by equal channel angular pressing. Different reaction of ultrafine-grained structure to plastic strain-controlled and load-controlled tests was found. The different susceptibility to dynamic grain coarsening under load and plastic strain-controlled tests reported in literature cannot be explained by differences in purity or details of equal channel angular pressing. The localization of the cyclic plasticity and the development of cyclic slip bands resulting in fatigue crack initiation take place in material volumes which can be characterized as -near by oriented- regions. They correspond to the shear bands, which are characteristic for ultrafine-grained structure after equal channel angular pressing.
Český abstrakt
Mikrostrukturní stabilita ultrajemnozrnných materiálu při cyklickém zatěžováníje je nezbytnou podmínkou pro jejich únavovou odolnost. V této práci byly zkoumány změny mikrostruktury způsobené únavovým zatěžováním (lokalizace cyklické plasticity do únavových skluzových pásů) a současně sledována relace únavových skluzových pásů a mikrostruktury ultrajemnozrnné Cu u niž byla UFG struktura dosažena pomocí intenzivní plastrické deformace.
Anglický abstrakt
Stability of microstructure of ultrafine-grained materials under cyclic loading is a crucial condition for their good fatigue performance. Changes of microstructure due to fatigue in bulk, localization of cyclic plasticity into cyclic slip bands and related development of microstructure were experimentally studied on ultrafine-grained copper prepared by equal channel angular pressing. Different reaction of ultrafine-grained structure to plastic strain-controlled and load-controlled tests was found. The different susceptibility to dynamic grain coarsening under load and plastic strain-controlled tests reported in literature cannot be explained by differences in purity or details of equal channel angular pressing. The localization of the cyclic plasticity and the development of cyclic slip bands resulting in fatigue crack initiation take place in material volumes which can be characterized as -near by oriented- regions. They correspond to the shear bands, which are characteristic for ultrafine-grained structure after equal channel angular pressing.
Klíčová slova česky
Únava ultrajemnozrnné Cu, mikrostrukturní stabilita, únavové skluzové pásy
Klíčová slova anglicky
Fatigue of ultrafine-grained Cu, stability of ultrafine-grained structure, cyclic slip bands
Rok RIV
2011
Vydáno
10.06.2011
Nakladatel
ELSEVIER
ISSN
1877-7058
Časopis
Procedia Engineering
Ročník
10
Číslo
ICM11
Strany od–do
201–206
Počet stran
6
BIBTEX
@article{BUT73820,
author="Ludvík {Kunz} and Petr {Lukáš} and Libor {Pantělejev} and Ondřej {Man},
title="Stability of ultrafine-grained structure of copper under fatigue loading",
journal="Procedia Engineering",
year="2011",
volume="10",
number="ICM11",
month="June",
pages="201--206",
publisher="ELSEVIER",
issn="1877-7058"
}