Microstructure and texture development in a polycrystal and different aluminium single crystals subjected to hydrostatic extrusion

Dorota Moszczyńska , Bogusława Adamczyk-Cieślak , Bartosz Osiak , Radosław Lipiec , Mariusz Kulczyk , Jarosław Mizera

Abstract

A hydrostatic extrusion (HE) process was applied to commercial pure polycrystalline aluminium (99.9%) and two aluminium single crystals <111> and <110>. On comparison, the results obtained from single crystals and polycrystalline aggregates are unique. Microstructure and crystallographic texture investigations were performed by transmission electron microscopy, electron backscatter diffraction and X-ray diffraction (XRD). Significant differences in grain refinement and texture formation were noticed depending on the starting orientation. The deformed single crystal with <110> starting orientation features an average grain size value of 150% higher than the second investigated single crystal (0.5 μm for the <111> single crystal and 1.3 μm for the second crystal). In turn, the average grain size obtained for polycrystalline aluminium is 0.9 μm. The deformation process causes a difference in the grain sizes, while a fraction of the high angle grain boundaries have a comparable volume percentage in all the deformed microstructures—reached about 35%. The qualitative and quantitative XRD texture results proved that the HE process leads to the formation of a characteristic fibrous texture.
Author Dorota Moszczyńska (FMSE / DMD)
Dorota Moszczyńska,,
- Division of Materials Design
, Bogusława Adamczyk-Cieślak (FMSE / DMD)
Bogusława Adamczyk-Cieślak,,
- Division of Materials Design
, Bartosz Osiak (FMSE / DMD)
Bartosz Osiak,,
- Division of Materials Design
, Radosław Lipiec (FMSE / DMD)
Radosław Lipiec,,
- Division of Materials Design
, Mariusz Kulczyk - Instytut Wysokich Ciśnień Polskiej Akademii Nauk (Instytut Wysokich Ciśnień Polskiej Akademii Nauk)
Mariusz Kulczyk,,
-
, Jarosław Mizera (FMSE / DMD)
Jarosław Mizera,,
- Division of Materials Design
Journal seriesBulletin of Materials Science, ISSN 0250-4707, (A 20 pkt)
Issue year2019
Vol42
No3
Pages110-117
Publication size in sheets0.5
Keywords in PolishTekstura odkształcenia, orientacja krystaliczna, monokryształ, dyfrakcja elektronów wstecznie rozproszonych, aluminium
Keywords in Englishdeformation texture, crystallographic orientation, single crystal, electron backscattering diffraction, aluminium
ASJC Classification2211 Mechanics of Materials; 2500 General Materials Science
DOIDOI:10.1007/s12034-019-1807-3
URL https://www.ias.ac.in/matersci
Languageen angielski
File
Bulletin of Materials.pdf 1.73 MB
Score (nominal)20
ScoreMinisterial score = 20.0, 26-07-2019, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 0.524; WoS Impact Factor: 2017 = 0.925 (2) - 2017=1.066 (5)
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