Journal
ACTA MATERIALIA
Volume 56, Issue 6, Pages 1298-1305Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2007.11.015
Keywords
X-ray diffraction (XRD); titanium alloys; short-range ordering; lattice defects; omega phase
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The diffuse scattering of body-centered cubic beta-Ti-V was measured using high-energy synchrotron X-rays and two-dimensional detectors. The study included in situ experiments of the equilibrium beta-phase and room temperature measurements of the quenched metastable state. The kinematical X-ray scattering revealed details in reciprocal space that could not be detected by the electron diffraction employed in previous studies. The signal was analyzed using a statistical thermodynamic approach based on physically motivated parameters. The characteristic features attributed to an omega-like structure or a diffuse omega-phase in the past are explained by static lattice distortions due to atomic size mismatch. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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