Phase and structural transformations in Ti-Ta alloys

Ab initio calculations of elastic properties of alloys with mechanical instability: Application to BCC Ti-V alloys

“…%, where C' becomes negative. This is in good agreement with the experimental data, as well as with earlier theoretical studies [16,20,43]. On the contrary, the mechanical instability of the alloys in Ti-rich region is not reproduced by the EMTO-CPA method.…”

Effect of the addition of Ta on microstructure and properties of Ti–Nb alloys

“…During the decomposition of the ␤ phase, in processes that occur out of equilibrium, metastable phases can be formed such as ␣ (hexagonal), ␣ (orthorhombic) and (hexagonal); ␣ and ␣ are martensitic phases and can be formed either by nucleation and growth during aging or plane collapse of the bcc structure along the [1 1 1] direction upon quenching [13][14][15]. phase precipitation has not been observed in Ti-Ta quenched alloys despite attempts to identify it [16,17]. The presence of these metastable phases depends on the composition and specific conditions of heat treatments and/or cooling rates.…”

Design of a nitrogen-implanted titanium-based superelastic alloy with optimized properties for biomedical applications

“…A metastable beta titanium alloy can be obtain if a sufficient amount of β-stabilizing elements is added to retain at room temperature the β microstructure (body centered cubic) after quenching from the beta domain. It is shown in literature that the microstructure and the mechanical properties of metastable β titanium alloys are very sensitive to composition changes and thermal treatments [2,10]. In a given composition domain, the metastable β microstructure may be mechanically unstable.…”