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INFLUENCE OF ECAP TECHNIQUE ON CREEP BEHAVIOUR OF POWDER ALUMINIUM PROCESSED BY DIRECT EXTRUSION
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SYSNO ASEP 0351485 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název INFLUENCE OF ECAP TECHNIQUE ON CREEP BEHAVIOUR OF POWDER ALUMINIUM PROCESSED BY DIRECT EXTRUSION Tvůrce(i) Dvořák, Jiří (UFM-A) RID, ORCID
Král, Petr (UFM-A) RID, ORCID
Balog, M. (SK)
Simančík, F. (SK)
Sklenička, Václav (UFM-A) RID, ORCIDZdroj.dok. Nanocon 2010, Conference Proceedings. - Ostrava : Tanger Ltd, 2010 - ISBN 978-80-87294-18-5 Rozsah stran s. 1-6 Poč.str. 6 s. Forma vydání CD-ROM - CD-ROM Akce NANOCON 2010. International Conference /2./ Datum konání 12.10.2010-14.10.2010 Místo konání Olomouc Země CZ - Česká republika Typ akce EUR Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova powder aluminium ; CREEP ; ECAP ; ultrafine-grained material Vědní obor RIV JJ - Ostatní materiály CEP KJB200410801 GA AV ČR - Akademie věd CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000286656400010 Anotace The Al powder was prepared by cold isostatic pressing at the pressure of 200 MPa. The granulometric powder fraction of a particle size less than 400 µm was compacted via conventional direct hot-extrusion (DE) at temperature 450°C. This material was then subjected to ECAP technique up to 4 passes. The microstructural investigations were performed using OM and SEM equipped with an EBSD unit. Creep tests in tension were conducted at temperature of 473 K and at applied stresses in the range from 30 to 60 MPa. Some creep tests in compression were performed on material just after DE. The paper presents results of study of microstructure and creep behaviour of aluminium powder before and after ECAP. It was found that ECAP method does not lead to an additional marked refinement of grain size. However, in dependence on number of ECAP passes ECAP method markedly influences creep behaviour due to development of high-angle grain boundaries during ECAP process. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2011
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