Measurements of Hf diffusion in α-Ti were made by using heavy-ion Rutherford back-scattering spectrometry at 900 to 1145K. It was found that the results could be described by:

D (cm2/s) = 4.0 x 10-2 exp[-60.5(kcal/mol)/RT]

These results were also in excellent agreement with published Rutherford back-scattering spectrometry data for 823 to 1023K. It was concluded that Fe had no effect upon Hf diffusion in this phase.

R.A.Pérez, F.Dyment, G.G.Bermúdez, H.Somacal, D.Abriola: Journal of Nuclear Materials, 1993, 207, 221-7