Enhancing the stability of β phase in TiZr via severe plastic deformation

The effect of strain rate on the stability of β phase in TiZr alloys that suffered severe plastic deformation (SPD) has been studied. With increasing strain rate from ε̇=0.33 to 1.52 and 2.19 s−1, the phase composition of the SPD TiZr alloys, after solution treatment (ST) at 850 °C for 1 h followed by water quenching, is determined to be α′+(17.9%)β, α″+(31.2%)β and α″+(41.6%)β, respectively, demonstrating a deformation-enhanced stability of β phase in the TiZr, which yields an enhancement of ductility and a decline of yield strength. The present study shows an alternative route to enhance the β-phase stability in TiZr alloys and thus should be of interest.