Nonlinear elastic deformation behaviour of Ti–30Nb–12Zr alloys

We report the nonlinear elastic deformation behaviour of Ti–30Nb–12Zr alloys containing varying amounts of oxygen and/or nitrogen. These alloys feature an electron/atom (e/a) ratio of ∼4.19, in between the e/a values of two groups of multifunctional titanium alloys reported previously (Gum Metal ∼4.24 and Ti2448 ∼4.15), and thus demonstrate an independence of the nonlinear elasticity on the e/a ratio. This study also found that the nonlinear elasticity persists in this type metastable β titanium alloys regardless of the presence of a small amount of other phases such as α, α′′ and ω.