|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Computational Design and Simulation of Materials (CDSM 2018): Meso/Macroscale Simulations
||Microstructure Prediction of Titanium Aluminides Using Multi-phase Phase Field Modelling
||Junyi Lee, Daniel Balint
|On-Site Speaker (Planned)
Titanium aluminide (TiAl) is an intermetallic that is a suitable candidate for many lightweight structural components, especially in high-temperature environments. The mechanical properties of TiAl are highly dependent on the microstructure of the material. Therefore, the ability to predict the microstructure evolution of this material can help determine the optimal processing parameters for this material. We have performed phase field simulations in order to simulate the microstructure evolution of titanium aluminides as it cools from the liquid phase to room temperature. In this simulation, a total of 5 phases were considered and the Gibbs free energies were calculated using CALPHAD. Additionally, quaternions that characterise the orientations of each of the crystals were included into the Gibbs free energy in order to simulate polycrystalline growth. The final microstructure was found to be affected by the cooling rate and composition. The methods and findings will be presented in the conference.
||Planned: Supplemental Proceedings volume