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The contributions of grain size, dislocation density and twinning to the strength of a magnesium alloy processed by ECAP

The contributions of grain size, dislocation density and twinning to the strength of a magnesium alloy processed by ECAP
The contributions of grain size, dislocation density and twinning to the strength of a magnesium alloy processed by ECAP
A ZK60 magnesium alloy was processed by equal-channel angular pressing (ECAP) for up to 8 passes at 473 K and the evolution of strength and microstructural parameters were determined using hardness testing and X-ray line profile analysis. The results show the subgrain size and twin boundary density increase between 1 and 2 passes and then decrease, the dislocation density continuously decreases up to 8 passes and the measured microhardness remains reasonably constant between 1 and 8 passes of ECAP. The results are interpreted using a model based on the additive effects of the dislocation density and an average size factor incorporating the effects of both the twin and the subgrain boundaries.

dislocation density, equal-channel angular pressing, magnesium alloy, twinning, x-ray line profile analysis
0921-5093
533-538
Balogh, Levente
bc1beb0e-e4dd-4549-9a2d-afda6c91a869
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Ungár, Tamás
680ae94a-9896-4aae-adb3-60bb9a492bf5
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Balogh, Levente
bc1beb0e-e4dd-4549-9a2d-afda6c91a869
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Ungár, Tamás
680ae94a-9896-4aae-adb3-60bb9a492bf5
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Balogh, Levente, Figueiredo, Roberto B., Ungár, Tamás and Langdon, Terence G. (2010) The contributions of grain size, dislocation density and twinning to the strength of a magnesium alloy processed by ECAP. Materials Science and Engineering: A, 528 (1), 533-538. (doi:10.1016/j.msea.2010.09.048).

Record type: Article

Abstract

A ZK60 magnesium alloy was processed by equal-channel angular pressing (ECAP) for up to 8 passes at 473 K and the evolution of strength and microstructural parameters were determined using hardness testing and X-ray line profile analysis. The results show the subgrain size and twin boundary density increase between 1 and 2 passes and then decrease, the dislocation density continuously decreases up to 8 passes and the measured microhardness remains reasonably constant between 1 and 8 passes of ECAP. The results are interpreted using a model based on the additive effects of the dislocation density and an average size factor incorporating the effects of both the twin and the subgrain boundaries.

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More information

Published date: 25 November 2010
Keywords: dislocation density, equal-channel angular pressing, magnesium alloy, twinning, x-ray line profile analysis
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 170877
URI: http://eprints.soton.ac.uk/id/eprint/170877
ISSN: 0921-5093
PURE UUID: 2946eeb8-7677-430b-aa9d-9569cd3c5c5f
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 11 Jan 2011 13:31
Last modified: 10 Dec 2019 01:47

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Contributors

Author: Levente Balogh
Author: Roberto B. Figueiredo
Author: Tamás Ungár

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