Developing superplasticity and a deformation mechanism map for the Zn–Al eutectoid alloy processed by high-pressure torsion


Kawasaki, Megumi and Langdon, Terence G. (2011) Developing superplasticity and a deformation mechanism map for the Zn–Al eutectoid alloy processed by high-pressure torsion. Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, 528, (19-20), 6140-6145. (doi:10.1016/j.msea.2011.04.053).

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Description/Abstract

A Zn–22% Al eutectoid alloy was processed by high-pressure torsion (HPT) for 1, 3 and 5 turns at room temperature to produce an ultrafine grain size of ∼350 nm. Tensile testing at a temperature of 473 K gave excellent superplastic properties with elongations to failure up to a maximum of 1800% at an imposed strain rate of 1.0 × 10−1 s−1: this is within the range of high strain rate superplasticity and represents the highest elongation recorded to date for a specimen processed by HPT. It is shown that the experimental data are in excellent agreement with a deformation mechanism map constructed for a temperature of 473 K

Item Type: Article
ISSNs: 0921-5093
Keywords: deformation mechanism maps, flow mechanisms, high-pressure torsion, superplasticity, ultrafine grains
Subjects: T Technology > TN Mining engineering. Metallurgy
Divisions: Faculty of Engineering and the Environment > Engineering Sciences > Bioengineering Research Group
ePrint ID: 335076
Date Deposited: 14 Mar 2012 08:48
Last Modified: 27 Mar 2014 20:19
URI: http://eprints.soton.ac.uk/id/eprint/335076

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