Deformation kinetics of the Ti-6Al-4V alloy at low temperatures

Predicting the effects of microstructural features on strain localization of a two-phase titanium alloy

“…It can be seen that the flow stress varies in an approximately linear fashion with the square root of strain, 0.5  . This linear relation was also found in [30] for Ti-7.4% at Al and in [22] for Ti-6Al-4V with equiaxed microstructure. Therefore, athermal stress,   , of α p can be approximated by:…”

“…The elements of O, N and C have significantly influence on the threshold stress. The strengthening effects of N and C are two times and 0.75 times higher than that of O, respectively [22]. Therefore, the equivalent concentration of interstitial solutes, can be expressed as [19]:…”

Multiaxial and non-proportional loading responses, anisotropy and modeling of Ti–6Al–4V titanium alloy over wide ranges of strain rates and temperatures

“…The equivalent oxygen content, O eq = O + 2N + 0.75C (De Meester et al, 1975), of this alloy was 0.222% wt. This alloy was manufactured using single electron beam melting process, resulting in higher oxygen content than the extra low interstitial (ELI) grade.…”

Temperature Dependence of Activation Enthalpy for Yielding in Bimodal Ti–6Al–4V

“…Fig. 7 Activation enthalpy obtained from Ti6Al4V comparing with energy levels of basal 37) and prismatic slips. 38,39) interfaces and proceeding of slips from one phase to other phase with different crystal structure at 20 K in Ti6Al4V.…”

“…Flow stress is much more sensitive towards strain rate than temperature and increases linearly with strain rate, which suggests the deformation process is controlled by thermally activated processes. De Meester et al 37) studied the deformation kinetics of Ti 6Al4V at low temperatures (42 K to 760 K) with additional interstitials. They showed that the rate-controlling mechanism in Ti6Al4V is the thermally activated process of dislocations overcoming interstitial solutes.…”