Microstructural evolution and mechanical properties of a two-phase Cu–Ag alloy processed by high-pressure torsion to ultrahigh strains
Microstructural evolution and mechanical properties of a two-phase Cu–Ag alloy processed by high-pressure torsion to ultrahigh strains
Disks of a coarse-grained Cu–28 wt.% Ag alloy were processed by high-pressure torsion up to 20 revolutions to reveal the microstructural evolution and mechanical properties. The eutectic shows a faster evolution process than the Cu matrix. A banded structure forms in the Cu matrix, and both the eutectic spacing and the band width decrease with increasing shear strain. After 20 revolutions, the substructure may even diminish in the Cu matrix. The microhardness increases with increasing revolutions, and a saturation microhardness is ultimately achieved. After 20 revolutions, the tensile strength was improved to 1420 MPa, and the failure mode of the sample was transferred from necking to full shearing without plasticity.
cu–ag alloy, high-pressure torsion, microstructure, hardness, fracture
2783-2796
Tian, Y.Z.
bda43954-296b-4f4e-8a9d-b35894da6b3e
Wu, S.D.
6df11381-5cbc-4b9b-ab65-b18b15272221
Zhang, Z.F.
32ae683a-dc37-4bb4-89b3-ecf266a4c4c9
Figueiredo, R.B.
1b4f5fa6-b201-4435-8f5e-13833fc8d504
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
April 2011
Tian, Y.Z.
bda43954-296b-4f4e-8a9d-b35894da6b3e
Wu, S.D.
6df11381-5cbc-4b9b-ab65-b18b15272221
Zhang, Z.F.
32ae683a-dc37-4bb4-89b3-ecf266a4c4c9
Figueiredo, R.B.
1b4f5fa6-b201-4435-8f5e-13833fc8d504
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Tian, Y.Z., Wu, S.D., Zhang, Z.F., Figueiredo, R.B., Gao, N. and Langdon, T.G.
(2011)
Microstructural evolution and mechanical properties of a two-phase Cu–Ag alloy processed by high-pressure torsion to ultrahigh strains.
Acta Materialia, 59 (7), .
(doi:10.1016/j.actamat.2011.01.017).
Abstract
Disks of a coarse-grained Cu–28 wt.% Ag alloy were processed by high-pressure torsion up to 20 revolutions to reveal the microstructural evolution and mechanical properties. The eutectic shows a faster evolution process than the Cu matrix. A banded structure forms in the Cu matrix, and both the eutectic spacing and the band width decrease with increasing shear strain. After 20 revolutions, the substructure may even diminish in the Cu matrix. The microhardness increases with increasing revolutions, and a saturation microhardness is ultimately achieved. After 20 revolutions, the tensile strength was improved to 1420 MPa, and the failure mode of the sample was transferred from necking to full shearing without plasticity.
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Published date: April 2011
Keywords:
cu–ag alloy, high-pressure torsion, microstructure, hardness, fracture
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 194481
URI: http://eprints.soton.ac.uk/id/eprint/194481
ISSN: 1359-6454
PURE UUID: 21845ba3-255f-4e1a-bc0a-500fc12fa4ab
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Date deposited: 28 Jul 2011 14:18
Last modified: 15 Mar 2024 03:13
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Contributors
Author:
Y.Z. Tian
Author:
S.D. Wu
Author:
Z.F. Zhang
Author:
R.B. Figueiredo
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