Abstract
Single crystals of metastable BCC Ti-6.5 at.% Mo alloy have been aged at 350°C for varying times to precipitate the omega phase. The variation in volume fraction of precipitate was determined by a quantitative X-ray diffraction technique and correlated with transmission electron microscopy from thin foils. For Ti-Mo alloys the lattice misfit between omega and beta phases is small; reflections from parallel planes of both phases overlap necessitating the use of reflections from nonparallel planes. The 310 beta reflection and 31 4 1 and 30 3 2 omega reflections were selected. These two omega reflections occurred at 96° and 105° 2θ angles with CuKα radiation and required a 14° reorientation of the crystal.
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