On the potential mechanisms of β to α′ + β decomposition in two phase titanium alloys during additive manufacturing: a combined transmission Kikuchi diffraction and 3D atom probe study

This paper focuses on the mechanisms of phase transformations in additively manufactured Ti–6Al–4V during cooling. In particular, the goal is to understand if the imposed thermal cycles during fabrication results in the complete transformation of the α′ to the β phase or the sub-transus decomposition of α′ (martensite) to α + β. To this effect, samples fabricated using electron beam melting and laser-directed energy deposition techniques were...