Microstructural evolution of Fe-rich particles in an Al-Zn-Mg-Cu Alloy during equal-channel angular pressing
Microstructural evolution of Fe-rich particles in an Al-Zn-Mg-Cu Alloy during equal-channel angular pressing
The microstructures of a severely deformed Al–Zn–Mg–Cu (AA7136) alloy have been characterized carefully using transmission electron microscopy and three-dimensional atom probe analysis. The Fe-rich intermetallic particles are predominantly Al13Fe4 type in the as-extruded alloy. Significantly, equal-channel angular pressing (ECAP) at 200 °C refines Fe-rich particles from 1 to 2 ?m to as small as 50 nm after 4 passes processing, and effectively narrow down their size distribution with the increase of number of ECAP passes. In addition, small Fe-rich particles evolve into spherical morphology and are in a more uniform distribution. The formations of Fe-rich phases in AA7136, the kinetic and thermodynamic effects in relation to the refinement of Fe-rich particles and their morphology evolution during ECAP processing are discussed.
aluminium alloys, ecap, fe-rich intermetallics, tem, 3sap
4742-4749
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
15 July 2010
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.
(2010)
Microstructural evolution of Fe-rich particles in an Al-Zn-Mg-Cu Alloy during equal-channel angular pressing.
Materials Science and Engineering: A, 527 (18-19), .
(doi:10.1016/j.msea.2010.04.041).
Abstract
The microstructures of a severely deformed Al–Zn–Mg–Cu (AA7136) alloy have been characterized carefully using transmission electron microscopy and three-dimensional atom probe analysis. The Fe-rich intermetallic particles are predominantly Al13Fe4 type in the as-extruded alloy. Significantly, equal-channel angular pressing (ECAP) at 200 °C refines Fe-rich particles from 1 to 2 ?m to as small as 50 nm after 4 passes processing, and effectively narrow down their size distribution with the increase of number of ECAP passes. In addition, small Fe-rich particles evolve into spherical morphology and are in a more uniform distribution. The formations of Fe-rich phases in AA7136, the kinetic and thermodynamic effects in relation to the refinement of Fe-rich particles and their morphology evolution during ECAP processing are discussed.
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Published date: 15 July 2010
Keywords:
aluminium alloys, ecap, fe-rich intermetallics, tem, 3sap
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 170675
URI: http://eprints.soton.ac.uk/id/eprint/170675
ISSN: 0921-5093
PURE UUID: 3f2325f2-2fe8-4746-88ff-dccf81d0fc97
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Date deposited: 10 Jan 2011 11:14
Last modified: 14 Mar 2024 02:47
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Author:
G. Sha
Author:
Y.B. Wang
Author:
X.Z. Liao
Author:
Z.C. Duan
Author:
S.P. Ringer
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