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Displacement measurements from nanoprecipitates in alloyed Cu single crystals using anomalous small‐ and wide‐angle X‐ray scattering
Author(s) -
Guillon I.,
Lyon O.,
Servant C.
Publication year - 2003
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889803003820
Subject(s) - materials science , scattering , crystallography , wide angle x ray scattering , rod , lattice (music) , small angle scattering , small angle neutron scattering , small angle x ray scattering , condensed matter physics , optics , neutron scattering , chemistry , medicine , physics , alternative medicine , pathology , acoustics
Single crystals of Cu‐3Ti, Cu‐41.5Ni‐16Fe and Cu‐23Ni‐7Fe (at. %) were studied by anomalous small‐angle and wide‐angle X‐ray scattering in order to determine the displacements induced by the precipitates (ordered Cu 4 Ti rods in the first case or (Ni,Fe) discs in the other cases) as a function of ageing time and temperature. The small‐angle scattering patterns give information on the size and arrangement of the precipitates, while the scattering around the Bragg peak allows the elastic lattice distortions around these precipitates to be determined. The precipitates formed in these three alloys are elastically contracted while the matrix enriched in Cu atoms is dilated. This succession of compressed and dilated regions is responsible for the alignment of the precipitates along the elastically soft directions <100>.