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Microstructural evolution and mechanical properties of a two-phase Cu–Ag alloy processed by high-pressure torsion to ultrahigh strains

Record type: Article

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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Citation

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), pp. 2783-2796. (doi:10.1016/j.actamat.2011.01.017).

More information

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
ORCID for T.G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 28 Jul 2011 14:18
Last modified: 18 Jul 2017 11:27

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Contributors

Author: Y.Z. Tian
Author: S.D. Wu
Author: Z.F. Zhang
Author: R.B. Figueiredo
Author: N. Gao
Author: T.G. Langdon ORCID iD

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