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

Effect of applied pressure on microstructure development and homogeneity in an aluminium alloy processed by high-pressure torsion
Effect of applied pressure on microstructure development and homogeneity in an aluminium alloy processed by high-pressure torsion
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.
0925-8388
736-745
Bazarnik, Piotr
844b4a15-226a-4275-9cee-812669fa033c
Romelczyk, Barbara
b488a1f0-3c33-4319-a40d-b2da627d87ae
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Lewandowska, Malgorzata
c574d02d-d34d-4164-8ed1-90c3d77584d2
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Bazarnik, Piotr
844b4a15-226a-4275-9cee-812669fa033c
Romelczyk, Barbara
b488a1f0-3c33-4319-a40d-b2da627d87ae
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Lewandowska, Malgorzata
c574d02d-d34d-4164-8ed1-90c3d77584d2
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Bazarnik, Piotr, Romelczyk, Barbara, Huang, Yi, Lewandowska, Malgorzata and Langdon, Terence G. (2016) Effect of applied pressure on microstructure development and homogeneity in an aluminium alloy processed by high-pressure torsion. Journal of Alloys and Compounds, 688, 736-745. (doi:10.1016/j.jallcom.2016.07.149).

Record type: Article

Abstract

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.

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Peter_JAC2016 accepted manuscript.pdf - Accepted Manuscript
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More information

Accepted/In Press date: 15 July 2016
e-pub ahead of print date: 16 July 2016
Published date: 15 December 2016
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 398091
URI: https://eprints.soton.ac.uk/id/eprint/398091
ISSN: 0925-8388
PURE UUID: fa577da7-b37e-4050-ba6e-55bc7876cdeb
ORCID for Yi Huang: ORCID iD orcid.org/0000-0001-9259-8123
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 18 Jul 2016 09:12
Last modified: 15 Aug 2019 05:24

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