The University of Southampton
University of Southampton Institutional Repository

Microstructure and microhardness of an Al-6061 metal matrix composite processed by high-pressure torsion

Microstructure and microhardness of an Al-6061 metal matrix composite processed by high-pressure torsion
Microstructure and microhardness of an Al-6061 metal matrix composite processed by high-pressure torsion
Disks of an Al-6061 metal matrix composite, reinforced with 10 vol.% Al2O3 particles, were processed by high-pressure torsion (HPT) at room temperature for 1/4, 1/2, 1, 5 and 10 turns under an applied pressure of 6.0 GPa. The evolution of microstructure was investigated using optical microscopy and scanning electron microscopy. During HPT processing the average grain size within the aluminum matrix decreased from ? 35 ?m in the unprocessed condition to ? 170 nm after processing through 10 turns but there was no significant effect on the size and distribution of the alumina particulate clusters. The values of the Vickers microhardness were recorded across the surface of each disk and then plotted as two-dimensional and three-dimensional color-coded contour maps. The results show the hardness increases from ? 56 Hv in the initial condition to ? 165 Hv after HPT for 10 turns. The results demonstrate that, as in many unreinforced metallic alloys, the evolution of hardness with strain exhibits strain hardening without any significant recovery.
1044-5803
270-278
Alhajeri, Saleh N.
32728ba0-8d0d-4268-b58d-4e97f3bc54aa
Al-Fadhalah, Khaled J.
364d5aed-c107-4104-9be0-6bf0ae28d20b
Almazrouee, Abdulla I.
6aaff277-2dcc-4dbd-afd0-75620aa6b6a9
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Alhajeri, Saleh N.
32728ba0-8d0d-4268-b58d-4e97f3bc54aa
Al-Fadhalah, Khaled J.
364d5aed-c107-4104-9be0-6bf0ae28d20b
Almazrouee, Abdulla I.
6aaff277-2dcc-4dbd-afd0-75620aa6b6a9
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Alhajeri, Saleh N., Al-Fadhalah, Khaled J., Almazrouee, Abdulla I. and Langdon, Terence G. (2016) Microstructure and microhardness of an Al-6061 metal matrix composite processed by high-pressure torsion. Materials Characterization, 118, 270-278. (doi:10.1016/j.matchar.2016.06.003).

Record type: Article

Abstract

Disks of an Al-6061 metal matrix composite, reinforced with 10 vol.% Al2O3 particles, were processed by high-pressure torsion (HPT) at room temperature for 1/4, 1/2, 1, 5 and 10 turns under an applied pressure of 6.0 GPa. The evolution of microstructure was investigated using optical microscopy and scanning electron microscopy. During HPT processing the average grain size within the aluminum matrix decreased from ? 35 ?m in the unprocessed condition to ? 170 nm after processing through 10 turns but there was no significant effect on the size and distribution of the alumina particulate clusters. The values of the Vickers microhardness were recorded across the surface of each disk and then plotted as two-dimensional and three-dimensional color-coded contour maps. The results show the hardness increases from ? 56 Hv in the initial condition to ? 165 Hv after HPT for 10 turns. The results demonstrate that, as in many unreinforced metallic alloys, the evolution of hardness with strain exhibits strain hardening without any significant recovery.

Text
Saleh-MC-accepted manuscript.pdf - Accepted Manuscript
Download (897kB)

More information

Accepted/In Press date: 3 June 2016
e-pub ahead of print date: 4 June 2016
Published date: 1 August 2016
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 396895
URI: http://eprints.soton.ac.uk/id/eprint/396895
ISSN: 1044-5803
PURE UUID: 789dabe4-8aec-4b76-8716-27714273d517
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 16 Jun 2016 08:25
Last modified: 17 Dec 2019 06:45

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×