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Stability of ultrafine-grained structure of copper under fatigue loading
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SYSNO ASEP 0361143 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Stability of ultrafine-grained structure of copper under fatigue loading Author(s) Kunz, Ludvík (UFM-A) RID, ORCID
Lukáš, Petr (UFM-A)
Pantělejev, L. (CZ)
Man, O. (CZ)Source Title Procedia Engineering. - Amsterdam : Elsevier BV
Roč. 10, - (2011), s. 201-206Number of pages 6 s. Language eng - English Country NL - Netherlands Keywords fatigue of ultrafine-grained Cu ; stability of ultrafine-grained structure ; cyclic slip bands ; shear bands Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects GAP108/10/2001 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000300451300033 DOI 10.1016/j.proeng.2011.04.036 Annotation 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. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2012
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