Using ring samples to evaluate the processing characteristics in high-pressure torsion
Using ring samples to evaluate the processing characteristics in high-pressure torsion
An Al–3% Mg–0.2% Sc alloy was processed by high-pressure torsion (HPT) using samples in the form of solid disks and rings. Following HPT, all values of the measured Vickers microhardness fall onto a single curve when plotted against the equivalent strain, such that there are increasing values of hardness at the lower strains and hardness saturation above equivalent strains of ~40. This saturation level is independent of the number of revolutions and the applied pressure. The grain size following HPT is ~220 nm, and tensile tests show that the material is superplastic at a testing temperature of 573 K.
hardness, high-pressure torsion, ring samples, superplasticity, ultrafine grains
1147-1153
Harai, Yosuke
f5418a6f-74cd-4ae4-b72b-4ef44c9cd695
Edalati, Kaveh
5f7cf0c9-1519-435f-a85b-4a2bbc3afb4c
Horita, Zenji
011521b8-3b29-494b-bf3f-346827ddbcce
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
February 2009
Harai, Yosuke
f5418a6f-74cd-4ae4-b72b-4ef44c9cd695
Edalati, Kaveh
5f7cf0c9-1519-435f-a85b-4a2bbc3afb4c
Horita, Zenji
011521b8-3b29-494b-bf3f-346827ddbcce
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Harai, Yosuke, Edalati, Kaveh, Horita, Zenji and Langdon, Terence G.
(2009)
Using ring samples to evaluate the processing characteristics in high-pressure torsion.
Acta Materialia, 57 (4), .
(doi:10.1016/j.actamat.2008.10.046).
Abstract
An Al–3% Mg–0.2% Sc alloy was processed by high-pressure torsion (HPT) using samples in the form of solid disks and rings. Following HPT, all values of the measured Vickers microhardness fall onto a single curve when plotted against the equivalent strain, such that there are increasing values of hardness at the lower strains and hardness saturation above equivalent strains of ~40. This saturation level is independent of the number of revolutions and the applied pressure. The grain size following HPT is ~220 nm, and tensile tests show that the material is superplastic at a testing temperature of 573 K.
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Published date: February 2009
Keywords:
hardness, high-pressure torsion, ring samples, superplasticity, ultrafine grains
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 67630
URI: http://eprints.soton.ac.uk/id/eprint/67630
ISSN: 1359-6454
PURE UUID: cbbf1c71-9098-4ec8-829a-b03b0c4658f7
Catalogue record
Date deposited: 28 Aug 2009
Last modified: 14 Mar 2024 02:47
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Contributors
Author:
Yosuke Harai
Author:
Kaveh Edalati
Author:
Zenji Horita
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