|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||High Entropy Alloys V
||Carbides-induced Hardening of CoCrFeMnNi Family of HEAs
||Adrianna Lozinko, Michal Mroz, Fares Haddad, Anna Fraczkiewicz
|On-Site Speaker (Planned)
CoCrFeMnNi alloys constitute a well-documented family of single-phased HEAs. Further optimization of these materials needs to use combined mechanisms of hardening; especially, precipitation hardening should bring strong effects. However, the predicted and already confirmed slow-down of diffusion in HEA may be a limiting factor for such an approach. In this work, the possibilities and conditions of carbides precipitation in CoCrFeMnNI are discussed. Alloys containing 200 ppm of carbone have been doped with niobium or tanatalum. Precipitation heat treatments have been chosen according to ThermoCalc predictions and their effects checked by experimental analyses. Niobium carbide (NbC) has been shown to ensure intergranular hardening as well as for limit efficiently the grain growth in recrystallized material.
||Planned: Supplemental Proceedings volume