Effect of Low-Temperature Aging on Mechanical Behavior of Metastable β-Type Ti-Mo-Sn Alloys

The work is devoted to studying the effect of alloying with Sn and a low-temperature aging (LTA) on the deformation behavior of quenched ternary pseudo-beta Ti-Mo-Sn alloys under uniaxial tension. The strengthening without embrittlement and loss of ductility was achieved in alloys of the Ti-12Mo-xSn (x=1÷6 wt%) system after LTA due to blocking the growth of particles of the embrittling omega-phase by alloying with Sn. LTA stimulates the induction of martensitic transformation under tensile deformation and an increase in the rate of strain hardening in the Ti-10Mo-xSn alloys. With an increase in the content of Mo in alloy up to 12-14%, the rate of strengthening significantly decreases. The deformation mechanism of these alloys is the combination of the TRIP/TWIP effects in a ratio.