The correspondence between self-diffusion properties and melting temperatures for α-Zr and α-Ti

Determinations of hypothetical hcp (α-phase) melting temperatures (Tmα) for Zr and Ti have been updated and the results considered in terms of common correspondences between self-diffusion properties of the elements and their melting temperatures (Tm). The present Tmα values for Zr and Ti are 1990±6 and 1707±4 K, respectively. The value for Zr is significantly higher than comparable values found earlier. These Tmα values and current data for self- and substitutional diffusion in α-Zr and α-Ti lead to reasonable accord with a common self-diffusion/Tm relationship for metals. (orig.)