|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||J-16 (Invited): Stability of the Stress-induced Phase in a TiZrHfNb0.3 Refractory High-entropy Alloy
||Xuesong Fan, Michael C. Gao, Xiehang Chen, Zongyang Lyu, Yan Chen, Ke An, Eran Greenberg, Vatali Prakapenka, Qiaoshi Zeng, Peter K. Liaw
|On-Site Speaker (Planned)
High-entropy alloys (HEAs) with excellent structural properties have attracted extensive attentions in the recent decade. Body-centered-cubic (BCC) HEAs, especially those based on refractory elements, show stable microstructures and great mechanical properties at elevated temperatures, which could be widely used in high-temperature applications. Similar to TRIP (transformation-induced plasticity) steels, the stress-induced phase-transformation was also observed in the TiZrHfNbx refractory HEAs recently. This concept can improve the ductility, which supplies the deficiency of BCC alloys and broaden the application of refractory HEAs. To deeply understand the phase stability of the stress-induced phase in TiZrHfNbx alloys, in-situ neutron diffraction experiments at high temperatures and in-situ synchrotron X-ray diffraction experiments at high pressures were conducted on the pre-deformed TiZrHfNb0.3 HEA in this work. Coupled with several simulation and calculation methods, the concept will be further verified to benefit the design of refractory HEAs with excellent properties combining both the strength and ductility.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume