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An X-ray absorption spectroscopy investigation of the local atomic structure in Cu–Ni–Si alloy after severe plastic deformation and ageing

An X-ray absorption spectroscopy investigation of the local atomic structure in Cu–Ni–Si alloy after severe plastic deformation and ageing
An X-ray absorption spectroscopy investigation of the local atomic structure in Cu–Ni–Si alloy after severe plastic deformation and ageing
The local atomic structure of Cu–Ni–Si alloy after severe plastic deformation (SPD) processing and the decomposition of supersaturated solid solution upon annealing were investigated by means of X-ray absorption spectroscopy. The coordination number and interatomic distances were obtained by analyzing experimental extend X-ray absorption fine structure data collected at the Ni K-edge. Results indicate that the environment of Ni atoms in Cu–Ni–Si alloy is strongly influenced by the deformation process. Moreover, ageing at 973 K affects strongly the atomic structure around the Ni atoms in Cu–Ni–Si deformed by equal channel angular pressing and high pressure torsion. This influence is discussed in terms of changes and decomposition features of the Cu–Ni–Si solid solution.
Cu–Ni–Si alloy, severe plastic deformation, equal channel angular pressing, high-pressure torsion, precipitation, synchrotron X-ray diffraction
1478-6435
2482-2490
Azzeddine, H.
b3f77568-bf9f-4e7e-93df-86b79fabe061
Harfouche, M.
2e18fb04-7e2a-46b3-ac51-0d0600b80658
Hennet, L.
23e7ff8a-4e85-42e1-85a7-5bdf7ec6abd0
Thiaudiere, D.
14e6f073-dcd6-4d99-b519-a8b53050df67
Kawasaki, M.
d0ce18b9-8403-4db2-9cb2-3a6165f288a6
Bradai, D.
dfc10bba-9e86-4e1d-b8fe-17c109d5f9fd
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Azzeddine, H.
b3f77568-bf9f-4e7e-93df-86b79fabe061
Harfouche, M.
2e18fb04-7e2a-46b3-ac51-0d0600b80658
Hennet, L.
23e7ff8a-4e85-42e1-85a7-5bdf7ec6abd0
Thiaudiere, D.
14e6f073-dcd6-4d99-b519-a8b53050df67
Kawasaki, M.
d0ce18b9-8403-4db2-9cb2-3a6165f288a6
Bradai, D.
dfc10bba-9e86-4e1d-b8fe-17c109d5f9fd
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Azzeddine, H., Harfouche, M., Hennet, L., Thiaudiere, D., Kawasaki, M., Bradai, D. and Langdon, T.G. (2015) An X-ray absorption spectroscopy investigation of the local atomic structure in Cu–Ni–Si alloy after severe plastic deformation and ageing. Philosophical Magazine, 95 (23), 2482-2490. (doi:10.1080/14786435.2015.1063790).

Record type: Article

Abstract

The local atomic structure of Cu–Ni–Si alloy after severe plastic deformation (SPD) processing and the decomposition of supersaturated solid solution upon annealing were investigated by means of X-ray absorption spectroscopy. The coordination number and interatomic distances were obtained by analyzing experimental extend X-ray absorption fine structure data collected at the Ni K-edge. Results indicate that the environment of Ni atoms in Cu–Ni–Si alloy is strongly influenced by the deformation process. Moreover, ageing at 973 K affects strongly the atomic structure around the Ni atoms in Cu–Ni–Si deformed by equal channel angular pressing and high pressure torsion. This influence is discussed in terms of changes and decomposition features of the Cu–Ni–Si solid solution.

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More information

Accepted/In Press date: 11 June 2015
e-pub ahead of print date: 9 July 2015
Published date: 2015
Keywords: Cu–Ni–Si alloy, severe plastic deformation, equal channel angular pressing, high-pressure torsion, precipitation, synchrotron X-ray diffraction
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 382388
URI: https://eprints.soton.ac.uk/id/eprint/382388
ISSN: 1478-6435
PURE UUID: ce90862e-89bf-426d-8eab-8e026f575ca6
ORCID for T.G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 27 Oct 2015 10:30
Last modified: 06 Jun 2018 12:48

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