Open Access Conference Proceedings

Anomalous X-ray diffraction measurements were performed on a metastable β titanium alloy (Ti-15 wt% Mo) containing thermodynamically metastable ω phase particles. The dependence of diffracted intensity on primary beam energy was measured for selected ω and β diffraction maxima for energies near the MoK absorption edge (20.0 keV). The main focus of the paper is the interpretation of diffuse scattering around the measured β peak. A simulation which qualitatively interprets the observed phenomenon is presented. The proposed model shows that elastic deformation of the β matrix results from both the difference in specific volumes of ω and β phases and a “cloud” of higher Mo content around each ω particle.

Keywords: Metastable β titanium alloys, phase transformations, ω phase, anomalous X-ray diffraction

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