|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Entropy Alloys VI
||Effect of NbC on Microstructure and Mechanical Properties of Selected HEA Alloys from CoCrFeMnNi Family
||Julia Olszewska, Adrianna Lozinko, Julia Olszewska, Jean Denis Mithieux, Anna Fraczkiewicz
|On-Site Speaker (Planned)
Nanocarbides are to be considered as a potential structural element to reinforce single-phase HEAs. Their effect may have two major origins: (i) precipitation hardening; (ii) grain refinement. Effects of NbC have been studied in single-phase non-equiatomic CrFeMnNi and equiatomic CoCrFeMnNi. Alloys doped with 0.3 at. % of Nb and 0.09 at. % of C were prepared by cold crucible casting and thermomechanically transformed by hot forging and/or cold rolling. In both cases, NbC precipitates were found in the FCC matrix. Significantly lower precipitation kinetics (as compared to “standard” FeCrNi alloys) has been experimentally observed and confirmed by numerical simulation (Prisma software). Indubitable beneficial effect of NbC has been shown: in its presence, grain growth was significantly slowed down without any loss of ductility of the materials both at room and cryogenic temperatures.
||Planned: Supplemental Proceedings volume