|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Entropy Alloys VI
||Phase Stability and Microstructural Optimization in Al0.5NbTa0.8Ti1.5V0.2Zr High Entropy Alloy
||Vishal Soni, Bharat Gwalani, Oleg Senkov, Adam L. Pilchak, Rajarshi Banerjee
|On-Site Speaker (Planned)
Refractory high entropy alloys (RHEAs) have been reported to offer greater microstructural stability and high strength at elevated temperatures. Addition of Al to RHEAs has not only helped in reducing the density of the alloys but also in precipitating coherent ordered phases to provide precipitation strengthening. Al0.5NbTa0.8Ti1.5V0.2Zr alloy has been reported to have a high strength of 2035MPa and a low density of about 7.43g/cm3. In present study, this alloy has been investigated in great detail using transmission electron microscopy (TEM) and atom probe tomography (APT) for microstructural evolution after controlled heat treatments at temperatures ranging from 600oC to 1400oC. The size scale and morphology of the secondary phases varied after different heat treatments depending on the temperature and mode of phase transformation (spinodal, nucleation and growth, or eutectoid decomposition).
||Planned: Supplemental Proceedings volume