Creep properties of aluminium processed by ECAP
Result description
The creep behaviour of pure polycrystalline aluminium and single crystals processed bynequal-channel angular pressing (ECAP) was investigated in order to understand the relationshipsnbetween heterogeneity of microstructure and creep behaviour. Tensile creep testsnwere performed at 373 K on specimens processed by 1 and 4 ECAP passes. For comparisonnpurposes, the creep tests were also carried out on coarse-grained specimens. Microstructurenanalyses showed that application of ECAP technique on polycrystalline aluminium and singlencrystals led to the formation of significantly different microstructures even after a relativelynhigh number of ECAP passes. The different creep behaviour of ECAP-processed single crystalsnand polycrystalline aluminium is influenced by inhomogeneity of microstructure. Further,nthe creep behaviour of specimens processed by 4 ECAP passes is affected by grain-boundarynmediated processes like enhanced recovery of dislocations at high-angle grain boundaries inngrains finer than quasi-stationary subgrain size and grain boundary sliding.
Keywords
equal channel angular pressing (ECAP)aluminiumultrafine-grained microstructurecreep
The result's identifiers
Result code in IS VaVaI
Alternative codes found
RIV/68081723:_____/16:00471641
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Creep properties of aluminium processed by ECAP
Original language description
The creep behaviour of pure polycrystalline aluminium and single crystals processed bynequal-channel angular pressing (ECAP) was investigated in order to understand the relationshipsnbetween heterogeneity of microstructure and creep behaviour. Tensile creep testsnwere performed at 373 K on specimens processed by 1 and 4 ECAP passes. For comparisonnpurposes, the creep tests were also carried out on coarse-grained specimens. Microstructurenanalyses showed that application of ECAP technique on polycrystalline aluminium and singlencrystals led to the formation of significantly different microstructures even after a relativelynhigh number of ECAP passes. The different creep behaviour of ECAP-processed single crystalsnand polycrystalline aluminium is influenced by inhomogeneity of microstructure. Further,nthe creep behaviour of specimens processed by 4 ECAP passes is affected by grain-boundarynmediated processes like enhanced recovery of dislocations at high-angle grain boundaries inngrains finer than quasi-stationary subgrain size and grain boundary sliding.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JG - Metallurgy, metal materials
OECD FORD branch
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Result continuities
Project
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Kovové materiály
ISSN
0023-432X
e-ISSN
—
Volume of the periodical
54
Issue of the periodical within the volume
6
Country of publishing house
SK - SLOVAKIA
Number of pages
11
Pages from-to
441-451
UT code for WoS article
000390642600006
EID of the result in the Scopus database
2-s2.0-85006504061
Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
JG - Metallurgy, metal materials
Year of implementation
2016