For the first time, static room-temperature 27Al nuclear magnetic resonance spectra were reported for Ti1-xAlx alloys, with x-values of between 0.25 and 0.55. The main resonances that were associated with the 2 and  phases were clearly revealed. The spectra reflected the phase distribution in that, for samples with x-values of 0.43 to 0.48 that had been annealed (1473K, 6h), resonances from both 2 and  were observed. In the case of single-phase samples, all Al nuclei from the central transition were recorded. However, in the case of 2-phase samples, there was a signal loss that was attributed to the 2-phase alloy microstructure. In the case of the -phase, the nuclear magnetic resonance center band exhibited a distinctive and largely second-order quadrupolar line-shape; together with associated satellite transitions which yielded a quadrupolar coupling constant of 8.15MHz and an axial Knight shift anisotropy of 130ppm. In the case of the  phase, the center-band simulation required only an axial Knight shift anisotropy of 270ppm with no quadrupolar interaction. An additional resonance which was associated with the -phase was also detected and was attributed to Al on antisites.

M.E.Smith, M.A.Gibson, C.T.Forwood, T.J.Bastow: Philosophical Magazine A, 1996, 74[3], 791-809