New procedures were developed, for analyzing chemical diffusion data in ternary alloys, in order to obtain the ratios of atom-vacancy exchange frequencies. These procedures were based upon the diffusion kinetics formalisms of Manning and Moleko et al. As a reference, the simple formalism in which off-diagonal phenomenological coefficients were neglected was also considered. The procedures were applied to measured interdiffusion coefficients in the γ-austenite phase of the Fe-Ni-Cr system at 1100C. It was shown that the ratios of the atom-vacancy exchange frequencies which were determined were reasonably consistent with those obtained from tracer diffusion data by using the same formalisms. It was shown that the 3 procedures gave quite similar results

for the frequency ratios in this alloy system, where the atomic components had similar sizes and diffusivities.

A New Analysis of Diffusion in Ternary Alloys - Application to FCC Fe-Ni-Cr Alloys. V.Belova, G.E.Murch: Acta Materialia, 2002, 50[18], 4617-27