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

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Description/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.

Item Type: Article
ISSNs: 1359-6454 (print)
Related URLs:
Keywords: hardness, high-pressure torsion, ring samples, superplasticity, ultrafine grains
Subjects: T Technology > TN Mining engineering. Metallurgy
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 67630
Date Deposited: 28 Aug 2009
Last Modified: 27 Mar 2014 18:48
URI: http://eprints.soton.ac.uk/id/eprint/67630

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