| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond V
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| Presentation Title |
Optimization of Cold-Rolling and Annealing Process to Achieve Ductile Refractory High Entropy Alloys with High Strength |
| Author(s) |
Kangjin Lee, Kanghyun Park, Junhee Han, Chanho Lee, Peter Liaw, Gian Song |
| On-Site Speaker (Planned) |
Kangjin Lee |
| Abstract Scope |
Refractory high-entropy alloys (RHEAs) have attracted significant attention, due to their outstanding properties and microstructural stability at elevated temperatures. However, since the RHEAs exhibit limited ductility at R.T, many studies have been focusing on designing high strength/plasticity RHEAs under compression. In our previous work, the HfTaTiV and HfTaTiZr RHEAs with the single BCC phase has been developed based on lattice distortion and VEC theories, which revealed excellent compressive yield strength and homogeneous plastic flow at R.T. 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. |