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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

Title
An X-ray absorption spectroscopy investigation of the local atomic structure in Cu-Ni-Si alloy after severe plastic deformation and ageing
Author
Kawasaki, Megumi
Keywords
synchrotron X-ray diffraction; Cu-Ni-Si alloy; high-pressure torsion; equal channel angular pressing; precipitation; severe plastic deformation
Issue Date
2015-08
Publisher
TAYLOR & FRANCIS LTD
Citation
PHILOSOPHICAL MAGAZINE, v. 95, NO 23, Page. 2482-2490
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 973K 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.
URI
http://www.tandfonline.com/doi/abs/10.1080/14786435.2015.1063790http://hdl.handle.net/20.500.11754/26921
ISSN
1478-6435; 1478-6443
DOI
10.1080/14786435.2015.1063790
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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