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Processing of a magnesium alloy by equal-channel angular pressing using a back-pressure

Processing of a magnesium alloy by equal-channel angular pressing using a back-pressure
Processing of a magnesium alloy by equal-channel angular pressing using a back-pressure
Experiments were conducted on the magnesium AZ31 alloy to evaluate the significance of conducting equal-channel angular pressing (ECAP) with a back-pressure. Following processing by ECAP, the values of the Vickers microhardness were recorded on the cross-sectional planes and microstructural observations were undertaken using transmission electron microscopy. The results show an increase in the hardness in the first pass with significant microstructural inhomogeneity and a transition towards a more homogeneous structure with subsequent passes. The grain size was measured as not, vert, similar0.9 ?m after 8 passes. A comparison with published data on the same alloy processed by ECAP without a back-pressure suggests several advantages in incorporating a back-pressure into ECAP. These advantages include the ability to achieve greater grain refinement, a potential for pressing at lower temperatures and the development of a more rapid evolution towards a homogeneous microstructure.
205-211
Xu, Cheng
af526865-aee4-4ef6-8174-def5c38149a2
Xia, Kenong
07ef42d9-f9f6-4b04-8a9b-6217795a8498
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Xu, Cheng
af526865-aee4-4ef6-8174-def5c38149a2
Xia, Kenong
07ef42d9-f9f6-4b04-8a9b-6217795a8498
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Xu, Cheng, Xia, Kenong and Langdon, Terence G. (2009) Processing of a magnesium alloy by equal-channel angular pressing using a back-pressure. Materials Science and Engineering: A, 527 (1-2), 205-211. (doi:10.1016/j.msea.2009.07.063).

Record type: Article

Abstract

Experiments were conducted on the magnesium AZ31 alloy to evaluate the significance of conducting equal-channel angular pressing (ECAP) with a back-pressure. Following processing by ECAP, the values of the Vickers microhardness were recorded on the cross-sectional planes and microstructural observations were undertaken using transmission electron microscopy. The results show an increase in the hardness in the first pass with significant microstructural inhomogeneity and a transition towards a more homogeneous structure with subsequent passes. The grain size was measured as not, vert, similar0.9 ?m after 8 passes. A comparison with published data on the same alloy processed by ECAP without a back-pressure suggests several advantages in incorporating a back-pressure into ECAP. These advantages include the ability to achieve greater grain refinement, a potential for pressing at lower temperatures and the development of a more rapid evolution towards a homogeneous microstructure.

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More information

Published date: December 2009
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 72353
URI: https://eprints.soton.ac.uk/id/eprint/72353
PURE UUID: c0633c06-9a48-41a3-bccd-63daa9b05478
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 10 Feb 2010
Last modified: 06 Jun 2018 12:48

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