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Compressive creep in Al-3%Mg-0.2%Sc alloy processed by equal-channel angular pressing
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SYSNO ASEP 0099350 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Compressive creep in Al-3%Mg-0.2%Sc alloy processed by equal-channel angular pressing Title Creep v tlaku u slitiny Al-3%Mg-0,2Sc tvářené metodou ECAP Author(s) Sklenička, Václav (UFM-A) RID, ORCID
Dvořák, Jiří (UFM-A) RID, ORCID
Svoboda, Milan (UFM-A) RID, ORCID
Král, Petr (UFM-A) RID, ORCID
Kvapilová, Marie (UFM-A) RID, ORCID
Horita, Z. (JP)Source Title Ultrafine grained materials IV. - Warrendale, Pennsylvania : TMS, 2006 / Zhu Y. T. ; Langdon T. G. ; Horita Z. ; Zehetbauer M. J. ; Semiatin S. L. ; Lowe T. C. - ISBN 978-0-87339-628-8 Pages s. 459-464 Number of pages 6 s. Action International Symposium on Ultrafine Grained Materials /4./ Event date 12.03.2006-16.03.2006 VEvent location San Antonio, Texas Country US - United States Event type WRD Language eng - English Country US - United States Keywords aluminum alloy ; equal-channel angular pressing ; creep testing Subject RIV JJ - Other Materials R&D Projects IAA2041301 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z20410507 - UFM-A (2005-2011) Annotation An Al-3wt.%Mg-0.2wt.%Sc alloy was subjected to ECAP pressing through 8 passes via the route BC. Creep tests in compression were conducted at 473 K on ECAP billets and, for comparison purposes, on unpressed material. The present results were compared with the results of our earlier work on creep of pure ECAP aluminium with the same imposed strain and the ECAP processing route. The results demonstrate that the creep strength of an Al-Mg-Sc alloy is significantly improved compared to that of pure Al. The higher strength observed for the pressed ternary alloy in the high-stress region results from the synergism of solid-solution strengthening and precipitate strengthening due to Al3Sc nanoscale precipitates. The presence of these precipitates dramatically increases the creep resistance in the low-stress region through a threshold stress for creep. However, the creep resistance of the ECAP processed material was markedly deteriorated with respect to unpressed one. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2008
Number of the records: 1