The influence of chemical composition and thermo-mechanical treatment on Ti–Nb–Ta–Zr alloys

Effects of post-aging cooling condition on structure and tensile properties of aged Ti–7.5Mo alloy

“…Low cooling rate-related increase in strength and decrease in elongation were also reported in early studies on Ti-Nb-Ta-Zr alloys by M álek et al [ 21 ] and Ti-4.3Fe-7.1Cr-3.0Al alloy by Ikeda et al [ 22 ]. The much higher strength and lower elongation observed in FC samples than other two aged samples suggest that the higher Mo concentration in β phase, rather than β phase content in the alloy, plays a more critical role in determining the alloy strength and elongation levels.…”

Mechanical properties and microstructure of Ti-35.5Nb-5.7Ta beta alloy

“…In conclusion, the following thermal treatment was found optimal for the Ti-35.5Nb-5.7Ta alloy: melting annealing at 800 °C for 0.5 hour followed by a cold swaging with a 52-79 % deformation, and fi nally, hardening at 500 °C for 2 hours in water. Therefore, similarly to the conclusions of the study (14), the alloy could be recommended for further testing and clinical studies. Future studies will focus further improvement of mechanic properties of the alloy Ti-35.5Nb-5.7Ta that might be reached by addition of some elements.…”

“…There is a signifi cant reduction of the exchange rate when compared to those titanium alloys forming only TiO 2 (13). Therefore, titanium alloys having Ta are considered promising dental materials with minimized corrosion behavior (14). Moreover, recent techniques that exploit coating of ceramics over dental implants (see e.g.…”

XRD and nanoindentation testing of thermo-mechanical processed Ti-29Nb-9Ta-10Zr alloy

“…On his turn, Niinomi et al [10] have developed an optimized quaternary Ti-29Nb--13Ta-4.6Zr (wt.%) alloy for which the elastic modulus is around 60 GPa. Malek et al [11] have investigated the influence of changing Zr and Ta contents on mechanical properties and also on precipitation of secondary phases during ageing treatment for some Ti-Nb--Ta-Zr alloys. Also, Nakai et al [12] have investigated the possibility of fatigue strength improvement for a particular biomedical β-type Ti-Nb-Ta-Zr alloy while maintaining low Young's modulus through optimizing ω-phase precipitation.…”