| Abstract Scope |
High-entropy alloys (HEAs) have been studied due to their unique microstructures and mechanical properties. Refractory high-entropy alloys (RHEA) exhibit outstanding mechanical properties, high temperature strength, creep resistance, and thermal stability. Nevertheless, most of RHEAs show high strength but low ductility at room temperature. Because of the limited ductility, RHEAs are less compatible with industrial applications than FCC-HEAs. For this reason, several alloy design strategies to tailor phase stability resulting in occurrence of mechanical phase transformation had been attempted to improve ductility with maintaining their high strength.
In this study, we developed refractory HEAs with the transformation-induced-plasticity (TRIP). To design TRIP-HEAs, we adopted Bo-Md diagram, which is known as a phase-stability diagram. This diagram allows for prediction of structural stability. To control Bo-Md values, we systematically designed Ti-Zr-Hf-V-Nb-Ta alloys, and investigated microstructure and deformation behavior, using scanning-electron microscope, energy-dispersive spectroscope, X-ray diffraction, electron-backscatter diffraction, in-situ neutron diffraction. |