|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||J-30: Design of Non-equiatomic Refractory High Entropy Alloys through Combination of Various Strengthening Mechanisms Towards Strength-ductility Synergy
||Cheng Zhang, Benjamin MacDonald, Fengwei Guo, Yongwang Kang, Xiaochang Xie, Zhiqiang Fu, Yizhang Zhou, Enrique Lavernia
|On-Site Speaker (Planned)
A novel non-equiatomic NbTaTi-based refractory high entropy alloy with reasonable density is introduced, which shows high strength at high temperature and good tensile ductility at room temperature through proper thermomechanical processing. The current alloy with BCC matrix is designed on the basis of the CALPHAD method. In the design process, apart from conventional solid-solution strengthening, some secondary phase for precipitation strengthening is introduced with the addition of Al and Si. Since Laves phases impair the ductility of refractory high entropy alloys, these phases are avoided in the current alloy design. Some elements that can absorb oxygen to form oxides are added, which can act as precipitates to strengthen the matrix and improve the oxidation resistance. Our results with this novel refractory high entropy alloy suggest that the proposed approach is promising for the design of novel refractory alloys.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume