The influence of solution treatment duration on microstructural and mechanical properties of a cold-rolled Ti-30Nb-12Zr-5Ta-2Sn-1.25Fe (wt.%) (TNZTSF) alloy was investigated in this study. The TNZTSF alloy was produced by cold-crucible induction in levitation synthesis technique, in argon-controlled atmosphere. After synthesis the alloy was processed by cold-rolling deformation, with a total deformation degree (total applied thickness reduction) of 50%, followed by a solution treatment at 850°C with a variable treatment duration from 2min to 30min, in 2min increments. Structural characterization was done using X-ray diffraction (XRD) and scanning electron microscopy (SEM). Mechanical properties were evaluated by tensile and hardness testing. The results show that, (1) the TNZTSF alloy contains single-phase β-Ti phase microstructure in all cold-deformed and solution treated conditions, (2) the microstructure of solution treated conditions shows an increasing in average grain-size and decreasing in internal average micro-strain with solution treatment duration increasing, (3) a suitable combination of high strength – high ductility properties could be obtained due to stability of the β phase.
Acknowledgements: This work was supported by a grant of the Romanian Ministry of Education and Research, CCCDI - UEFISCDI, project number PN-III-P4-2.1-ID PCE-2020-1934, contract PCE213/2021, within PNCDI III.