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KUNZ, L. LUKÁŠ, P. PANTĚLEJEV, L. MAN, O.
Original Title
Stability of ultrafine-grained structure of copper under fatigue loading
Type
journal article - other
Language
English
Original Abstract
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.
Keywords
Fatigue of ultrafine-grained Cu, stability of ultrafine-grained structure, cyclic slip bands
Authors
KUNZ, L.; LUKÁŠ, P.; PANTĚLEJEV, L.; MAN, O.
RIV year
2011
Released
10. 6. 2011
Publisher
ELSEVIER
ISBN
1877-7058
Periodical
Procedia Engineering
Year of study
10
Number
ICM11
State
Kingdom of the Netherlands
Pages from
201
Pages to
206
Pages count
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", pages="201--206", issn="1877-7058" }