Abstract Scope |
This study investigates the controlled fabrication of Ti45Al8Nb alloy using self-propagating in-situ synthesis guided by thermodynamic modeling. It explores the impact of the Al stoichiometric ratio on alloy and slag composition, microstructural morphology, and inclusion distribution. Findings demonstrate the thermodynamic model's effectiveness in governing desired alloy composition, guiding titanium-aluminum alloy composition tailoring. Under specific conditions (Al stoichiometric coefficient 0.8, system's specific reaction enthalpy 3250 J/g), a titanium-aluminum alloy with Ti, Al, Nb, O, and N mass fractions of 51.8 wt%, 29.5 wt%, 17.4 wt%, 1.2 wt%, and 0.0016 wt% is achieved. The primary phases are TiAl and TiAl3/NbAl3. Increasing aluminum content reduces inclusion content and size. This study proposes an efficient, scalable method for producing high-quality titanium-aluminum alloys at a reduced cost by leveraging the thermodynamic model to predict and regulate self-propagating synthesis. |