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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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.
|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
|Date Deposited:||28 Aug 2009|
|Last Modified:||01 Jun 2011 12:26|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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