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 |
| Item ID: | 67630 |
| Date Deposited: | 28 Aug 2009 |
| Last Modified: | 01 Jun 2011 12:26 |
| Contributors: | Harai, Yosuke (Author) Edalati, Kaveh (Author) Horita, Zenji (Author) Langdon, Terence G. (Author) |
| Date: | February 2009 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/67630 |
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