|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Microstructural Templates Consisting of Isostructural Ordered Precipitate / Disordered Matrix Combinations: Microstructural Evolution and Properties
||Comparison of γ' and B2 Precipitates and Their Influence on the Mechanical Behavior of FeNiCoAl-based High-entropy Alloys
||Cheng Zhang, Benjamin E. MacDonald, Mingjie Xu, Enrique J. Lavernia
|On-Site Speaker (Planned)
||Enrique J. Lavernia
As one of the most popular face-centered cubic high-entropy alloys (HEAs), FeNiCoAl-based HEAs exhibit highly tunable properties, such as an excellent strength-ductility synergy at ambient or cryogenic temperatures. Up to date, depending on the Al concentration, some studies have addressed the influence of the L12 γ’ (including Ni3Al and Ni3Ti) nanoscale particles, while other studies have focused on the effect of the B2 (NiAl) precipitates. In this talk, we will compare the influence of γ’ and B2 precipitates on the mechanical behavior of FeNiCoAl-based HEAs. The thermal stability of these two precipitates at elevated temperatures will also be addressed. In addition, some new nanoscale particles inside these initial precipitates at specific temperatures will be shown, which effectively lead to the formation of a hierarchical structure. Finally, a strategy involving the use of γ’ and B2 to tailor the microstructure of FeNiCoAl-based HEAs for additional strengthening will be described.