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An Evaluation of Creep Mechanisms in Ultrafine-Grained Metals
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SYSNO ASEP 0359645 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title An Evaluation of Creep Mechanisms in Ultrafine-Grained Metals Author(s) Kvapilová, Marie (UFM-A) RID, ORCID
Sklenička, Václav (UFM-A) RID, ORCID
Dvořák, Jiří (UFM-A) RID, ORCID
Král, Petr (UFM-A) RID, ORCIDSource Title Key Engineering Materials - ISSN 1013-9826
Roč. 465, - (2011), s. 382-385Number of pages 4 s. Action MSMF /6./ Materials Structure and Micromechanics of Fracture Event date 28.06.2010-30.06.2010 VEvent location Brno Country CZ - Czech Republic Event type WRD Language eng - English Country CH - Switzerland Keywords creep ; equal-chanel angular pressing ; ultrafine-grained microstructure Subject RIV JJ - Other Materials CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000291704700088 DOI 10.4028/www.scientific.net/KEM.465.382 Annotation Our earlier published creep data are analyzed for ultrafine-grained pure aluminium and copper processed by equal-channel angular pressing (ECAP). The analysis demonstrates conclusively that creep occurs in the investigated materials after ECAP by the same mechanism as in conventional coarse-grained materials with intergranular dislocation glide and climb as the dominant ratecontrolling flow process. Under creep conditions examined in this work diffusion creep is not important in pure aluminium and copper because the ultrafine grains are unstable at elevated and/or high temperature creep and the grains grow sufficiently to preclude any significant contribution from Nabarro-Herring or Coble creep Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2012
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