Simple models to account for the formation and decomposition of athermal ω phase in titanium alloys

Abstract

The models to account for the formation and decomposition mechanisms of athermal ω phase in titanium alloys are described. It is demonstrated that the athermal ω formation of titanium alloys is a result of the atom collapse from the (110) to (111) planes along the <111> direction in β phase. The model also suggests that the rigid atom clusters originated from athermal ω phase can be directly developed to the perfect α phase with the help of vacancies.