| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
| Presentation Title |
Development of Ductile Refractory High Entropy Alloys with High Strength via Controlling Cold-Rolling and Annealing Process |
| Author(s) |
Kangjin Lee, Yunjong Jung, Kanghyun Park, Chanho Lee, Gian Song |
| On-Site Speaker (Planned) |
Kangjin Lee |
| Abstract Scope |
Refractory high-entropy alloys (RHEAs) have attracted outstanding properties like high strength and microstructural stability at elevated temperatures. However, since the RHEAs exhibit ambient brittleness, many studies have been focusing on designing high strength/plasticity RHEAs under compression. In our previous work, the single BCC HfTaTiV and HfTaTiZr RHEAs has been developed based on lattice distortion and VEC theories, which revealed excellent compressive yield strength and plasticity at R.T (no fracture happens until 50%). In this study, a systematic cold rolling and heat treatment was carried out to control the microstructure characteristics, such as size and orientation of grains and to achieve the excellent combination of tensile strength and ductility at room temperature. Their microstructure evolution and tensile deformation behavior were investigated using neutron diffraction, transmission electron microscopy, electron backscatter diffraction, and universal testing machine. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, High-Temperature Materials, |