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Using ring samples to evaluate the processing characteristics in high-pressure torsion

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), pp. 1147-1153. (doi:10.1016/j.actamat.2008.10.046).

Record type: Article


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


Local EPrints ID: 67630
ISSN: 1359-6454
PURE UUID: cbbf1c71-9098-4ec8-829a-b03b0c4658f7
ORCID for Terence G. Langdon: ORCID iD

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Date deposited: 28 Aug 2009
Last modified: 19 Jul 2017 00:18

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Author: Yosuke Harai
Author: Kaveh Edalati
Author: Zenji Horita

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