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Creep properties of aluminium processed by ECAP

SYSNO ASEP	0471641
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Creep properties of aluminium processed by ECAP
Author(s)	Král, Petr (UFM-A)_{RID, ORCID} Dvořák, Jiří (UFM-A)_{RID, ORCID} Jäger, Aleš (FZU-D)_{RID, ORCID} Kvapilová, Marie (UFM-A)_{RID, ORCID} Horita, Z. (JP) Sklenička, Václav (UFM-A)_{RID, ORCID}
Number of authors	6
Source Title	Kovové materiály. - : Ústav fyziky materiálu AV ČR, v. v. i. - : Ústav materiálov a mechaniky strojov SAV. - : Ústav materiálového výskumu SAV. - : Strojnícka fakulta STU - ISSN 0023-432X Roč. 54, č. 6 (2016), s. 441-451
Number of pages	11 s.
Language	eng - English
Country	SK - Slovakia
Keywords	equal channel angular pressing (ECAP) ; aluminium ; ultrafine-grained microstructure ; creep
Subject RIV	JG - Metallurgy
Subject RIV - cooperation	Institute of Physics - Metallurgy
R&D Projects	LQ1601 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UFM-A - RVO:68081723 ; FZU-D - RVO:68378271
UT WOS	000390642600006
EID SCOPUS	85006504061
DOI	10.4149/km_2016_6_441
Annotation	The creep behaviour of pure polycrystalline aluminium and single crystals processed by equal-channel angular pressing (ECAP) was investigated in order to understand the relationships between heterogeneity of microstructure and creep behaviour. Tensile creep tests were performed at 373 K on specimens processed by 1 and 4 ECAP passes. For comparison purposes, the creep tests were also carried out on coarse-grained specimens. Microstructure analyses showed that application of ECAP technique on polycrystalline aluminium and single crystals led to the formation of significantly different microstructures even after a relatively high number of ECAP passes. The different creep behaviour of ECAP-processed single crystals and polycrystalline aluminium is influenced by inhomogeneity of microstructure. Further, the creep behaviour of specimens processed by 4 ECAP passes is affected by grain-boundary mediated processes like enhanced recovery of dislocations at high-angle grain boundaries in grains finer than quasi-stationary subgrain size and grain boundary sliding.
Workplace	Institute of Physics of Materials
Contact	Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
Year of Publishing	2017

Number of the records: 1