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Influence of equal-channel angular pressing on pPrecipitation kinetics in an Al-Zn-Mg-Cu alloy

Influence of equal-channel angular pressing on pPrecipitation kinetics in an Al-Zn-Mg-Cu alloy
Influence of equal-channel angular pressing on pPrecipitation kinetics in an Al-Zn-Mg-Cu alloy
Processing by equal-channel angular pressing (ECAP) affects the morphology of ? precipitates in an Al–Zn–Mg–Cu (Al-7136) alloy. It is shown by transmission electron microscopy that ECAP changes the orientation of precipitates and this influences the atomic configuration and the interfacial energy at the ?/?-Al interfaces. Consequently, ? precipitates adopt an isotropic growth mode and evolve into equiaxed particles. A three-dimensional atom probe analysis demonstrates that large ? precipitates formed in different numbers of ECAP passes are of similar composition. The coalescence of smaller precipitates, rather than the fragmentation of larger precipitates, dominates the precipitate evolution.
1359-6454
3123-3132
Sha, G.
5f1b8bea-6129-426f-870e-988902682b1e
Wang, Y.B.
30d7b540-dc88-4382-867a-28d0354a8495
Liao, X.Z.
f0645a6d-aee1-4d28-aa13-f1b00fdedc41
Duan, Z.C.
dfe30fda-8c6c-41f9-9868-3df183fb1d12
Ringer, S.P.
2b986d4b-e93c-4801-9a1b-b16b39c30242
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Sha, G.
5f1b8bea-6129-426f-870e-988902682b1e
Wang, Y.B.
30d7b540-dc88-4382-867a-28d0354a8495
Liao, X.Z.
f0645a6d-aee1-4d28-aa13-f1b00fdedc41
Duan, Z.C.
dfe30fda-8c6c-41f9-9868-3df183fb1d12
Ringer, S.P.
2b986d4b-e93c-4801-9a1b-b16b39c30242
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Sha, G., Wang, Y.B., Liao, X.Z., Duan, Z.C., Ringer, S.P. and Langdon, T.G. (2009) Influence of equal-channel angular pressing on pPrecipitation kinetics in an Al-Zn-Mg-Cu alloy. Acta Materialia, 57 (10), 3123-3132. (doi:10.1016/j.actamat.2009.03.017).

Record type: Article

Abstract

Processing by equal-channel angular pressing (ECAP) affects the morphology of ? precipitates in an Al–Zn–Mg–Cu (Al-7136) alloy. It is shown by transmission electron microscopy that ECAP changes the orientation of precipitates and this influences the atomic configuration and the interfacial energy at the ?/?-Al interfaces. Consequently, ? precipitates adopt an isotropic growth mode and evolve into equiaxed particles. A three-dimensional atom probe analysis demonstrates that large ? precipitates formed in different numbers of ECAP passes are of similar composition. The coalescence of smaller precipitates, rather than the fragmentation of larger precipitates, dominates the precipitate evolution.

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More information

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

Identifiers

Local EPrints ID: 67658
URI: https://eprints.soton.ac.uk/id/eprint/67658
ISSN: 1359-6454
PURE UUID: 0649cfbc-b615-4d51-9384-49352d91cc3b
ORCID for T.G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 02 Sep 2009
Last modified: 06 Jun 2018 12:48

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