About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Advances in Refractory High Entropy Alloys and Ceramics
|
| Presentation Title |
Dynamic Behavior of NbTaTiHf High-Entropy Alloy |
| Author(s) |
Aomin Huang, Joydeep Kundu, Sheron Tavares, Fanyue Kong, Abdallah Fahmy, David Cook, Joshua Peltz, Matt Foong, Calvin Belcher, Calvin Belcher, Sakshi Bajpai, Anne Voigt, Diran Apelian, Marc A. Meyers, Enrique J. Lavernia |
| On-Site Speaker (Planned) |
Aomin Huang |
| Abstract Scope |
Refractory high-entropy alloys (RHEAs) have gained significant attention because of their excellent performance at high temperatures. Among these, the NbTaTiHf RHEA shows great potential due to its high fracture resistance and good room-temperature workability. Despite its remarkable ductility over a wide temperature range, primarily due to kink-band deformation, the alloy exhibits limited strain-hardening capacity. The absence of effective work-hardening mechanisms indicates a possible lack of resistance to shear localization. In this work, we examine the mechanical response of NbTaTiHf RHEA under high-strain-rate deformation. Since the main deformation mechanisms change with loading conditions, this study aims to clarify how deformation modes evolve under different loads and identify the critical conditions for the onset of shear instability and localization. These results offer insights into the deformation physics of RHEAs under extreme loading, and help guide the development of alloys with better resistance to shear localization. |