Design of Titanium Alloys Showing Plasticity Induced Transformation
Due to Plasticity induced Transformation in metastable β-Ti-10V-2Fe-3Al (wt.%) alloy (PiTTi) upon deformation, a noticeable improvement in mechanical properties is observed. Among the main factors controlling such effect are the β grain size and its composition. Such phase transforms into martensite upon quenching. Its martensite start temperature (Ms) varies in accordance with its composition. Following Ghosh and Olson’s theory, a thermodynamics based model to predict the compositional dependence of the Ms temperature is developed, and successfully validated for Ti-X (X = Fe, Cr, Mo, V, Nb, Zr and Al) binary alloys. The model has been used to design new alloys displaying a tailored PiTTi effect.
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
S. Neelakantan et al., "Design of Titanium Alloys Showing Plasticity Induced Transformation ", Advanced Materials Research, Vols. 89-91, pp. 405-410, 2010