Elastic modulus of Ti–6Al–4V–xB alloys with B up to 0.55 wt.%

An anomalous variation in the experimental elastic modulus, E, of Ti–6Al–4V–xB (with x up to 0.55 wt.%) is reported. Volume fractions and moduli of the constituent phases were measured using microscopy and nanoindentation, respectively. These were used in simple micromechanical models to examine if the E values could be rationalized. Experimental E values higher than the upper bound estimates suggest complex interplay between microstructural modifications, induced by the addition of B, and properties.