Synthesis and phase transformations of beta metastable Ti-based alloys containing biocompatible Ta, Mo and Fe beta-stabilizer elements

The synthesis and phase transformation behaviors of six new β Ti alloys containing Ta, Mo, and Fe biocompatible elements were studied. The alloys had been synthesized by arc-melting furnace. The alloys were then quenched in water from the beta phase fields. The different phase transitions upon heating were detected by employing Electric Resistivity Measurements (ERM) and Differential Scanning Calorimetry (DSC). The thermally activated nanostructure was observed by using Transmission electron Microscopy (TEM). The precipitation of α inter in intra granular phase formation were successively detected upon heating from room temperature to the beta transus. The alloys can be classified as beta-metastable since different phase transformation are detected both by ERM and DSC. A coherent pseudo-binary phase diagram was proposed to explain the different phase transitions behavior upon heating.