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Evolution of microstructure and hardness in an AZ80 magnesium alloy processed by high-pressure torsion

Evolution of microstructure and hardness in an AZ80 magnesium alloy processed by high-pressure torsion
Evolution of microstructure and hardness in an AZ80 magnesium alloy processed by high-pressure torsion
An AZ80 magnesium alloy with an initial grain size of ?25 ?m and a hardness of Hv ? 63 was processed by high-pressure torsion (HPT) at room temperature for up to 10 turns under an imposed pressure of 6.0 GPa. After processing, the specimens were examined by optical microscopy and transmission electron microscopy and measurements were taken of the Vickers microhardness along diameters of the HPT discs. The results show that the grains are refined to ?200 nm after 5 and 10 turns of HPT and the hardness increases to Hv ? 120 at an equivalent strain of ?30. There is a saturation condition and no further hardening at additional equivalent strains up to >200.
hardness, high-pressure torsion, magnesium AZ80 alloy, ultrafine grains
2238-7854
152-158
Alsubaie, Saad A.
dc2c6aee-a9af-439d-9fb8-cf5c3091b9b4
Bazarnik, Piotr
844b4a15-226a-4275-9cee-812669fa033c
Lewandowska, Malgorzata
c574d02d-d34d-4164-8ed1-90c3d77584d2
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Alsubaie, Saad A.
dc2c6aee-a9af-439d-9fb8-cf5c3091b9b4
Bazarnik, Piotr
844b4a15-226a-4275-9cee-812669fa033c
Lewandowska, Malgorzata
c574d02d-d34d-4164-8ed1-90c3d77584d2
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Alsubaie, Saad A., Bazarnik, Piotr, Lewandowska, Malgorzata, Huang, Yi and Langdon, Terence G. (2016) Evolution of microstructure and hardness in an AZ80 magnesium alloy processed by high-pressure torsion. Journal of Materials Research and Technology, 5, 152-158. (doi:10.1016/j.jmrt.2015.11.006).

Record type: Article

Abstract

An AZ80 magnesium alloy with an initial grain size of ?25 ?m and a hardness of Hv ? 63 was processed by high-pressure torsion (HPT) at room temperature for up to 10 turns under an imposed pressure of 6.0 GPa. After processing, the specimens were examined by optical microscopy and transmission electron microscopy and measurements were taken of the Vickers microhardness along diameters of the HPT discs. The results show that the grains are refined to ?200 nm after 5 and 10 turns of HPT and the hardness increases to Hv ? 120 at an equivalent strain of ?30. There is a saturation condition and no further hardening at additional equivalent strains up to >200.

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More information

Accepted/In Press date: 25 November 2015
e-pub ahead of print date: 21 January 2016
Published date: 25 May 2016
Keywords: hardness, high-pressure torsion, magnesium AZ80 alloy, ultrafine grains
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 384823
URI: http://eprints.soton.ac.uk/id/eprint/384823
ISSN: 2238-7854
PURE UUID: 11396692-376a-4f48-8537-f38af027b089
ORCID for Yi Huang: ORCID iD orcid.org/0000-0001-9259-8123
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 26 Jan 2016 12:05
Last modified: 17 Dec 2019 01:50

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