Molar volumes of bcc, hcp, and orthorhombic Ti-base solid solutions at room temperature.

The room-temperature molar volumes of bcc (β), hcp (equilibrium α or martensitic α′), and orthorhombic (martensitic α′′) phases are modeled for a number of Ti-base solid solutions in the CALPHAD framework. The martensitic molar volume is continuous at the α′/α′′ transition composition. Hcp and orthorhombic structures are modeled separately, and the predicted martensitic structure is taken as the denser one. [ABSTRACT FROM AUTHOR]