Effect of applied pressure on microstructure development and homogeneity in an aluminium alloy processed by high-pressure torsion

Piotr Bazarnik , Barbara Romelczyk , Huang Yi , Małgorzata Lewandowska , Terence G. Langdon


An investigation was conducted to evaluate the influence of applied pressure on the processing of an aluminium 5483 alloy by high-pressure torsion (HPT). Discs were processed by HPT through 1/4 to 5 revolutions at room temperature using the two different applied pressures of 1.0 and 6.0 GPa. Samples were examined after HPT using microhardness measurements and transmission electron microscopy. Colour-coded maps were constructed to show the hardness distributions and the mechanical properties were evaluated by tensile testing. It is shown that the results are dependent upon the applied pressure such that a higher pressure enhances the accumulation of defects and leads to a more rapid grain refinement. The effect of pressure is especially visible in the early stages after fractional numbers of turns since the microstructure and properties tend to homogenize at high numbers of turns. © 2016 Elsevier B.V. All rights reserved.
Author Piotr Bazarnik (FMSE / DMD)
Piotr Bazarnik,,
- Division of Materials Design
, Barbara Romelczyk (FMSE / DMD)
Barbara Romelczyk,,
- Division of Materials Design
, Huang Yi - University of Southampton
Huang Yi,,
, Małgorzata Lewandowska (FMSE / DMD)
Małgorzata Lewandowska,,
- Division of Materials Design
, Terence G. Langdon - University of Southampton, University of Southern California [University of Southampton]
Terence G. Langdon,,
Journal seriesJournal of Alloys and Compounds, ISSN 0925-8388
Issue year2016
Publication size in sheets0.5
Keywords in EnglishAl-Mg alloy, Applied pressure, Grain refinement, High-pressure torsion, Microhardness
ASJC Classification2505 Materials Chemistry; 2506 Metals and Alloys; 2210 Mechanical Engineering; 2211 Mechanics of Materials
Languageen angielski
2016 JALCOM Bazarnik.pdf 2.6 MB
Score (nominal)35
Score sourcejournalList
ScoreMinisterial score = 35.0, 10-06-2020, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 10-06-2020, ArticleFromJournal
Publication indicators Scopus Citations = 12; WoS Citations = 8; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.332; WoS Impact Factor: 2016 = 3.133 (2) - 2016=2.919 (5)
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