from the conferences organized by TANGER Ltd.
Titanium alloys are materials exhibiting outstanding physical and functional properties. Metastable β titanium alloys are a prospective group featuring complex phase transformations which can be utilized to tailor the material performance. Microstructural mechanisms underlying phase transformations in this group of Ti alloys are not completely understood. In particular, the formation of different morphologies of ω phases is of major importance as the ω particles act as nucleation sites for the formation of stable α phase. In this study, we employ a finite element model (FEM) to account for the formation of two types of ω phase, namely, the ellipsoidal athermal ω phase and the lamellar stress-induced ω phase. The proposed model calculates elastic strain energies in β titanium containing either athermal or stress-induced ω phase and, thus, determines the preferential morphology of the formed ω phase in relation to the stress magnitude and direction.
Keywords: β titanium, ω phase, FEM, phase transformation© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.