|About this Abstract
||3rd World Congress on High Entropy Alloys (HEA 2023)
||Development of Coherent Ru-based BCC + B2 Alloys with High Thermal Stability
||Carolina Frey, Anthony Botros, Sebastian Kube, Haojun You, Tresa Pollock
|On-Site Speaker (Planned)
Refractory Multi-Principal Element Alloys (RMPEAs) are a new class of structural alloys for extreme environments with the potential to push operating temperatures above 1200 °C. However, the development of alloys that can operate at desired temperatures of 1300-1400 °C has been limited by a lack of coherent strengthening precipitates that can persist at the target temperatures. For this investigation, solution and ageable BCC + B2 alloys have been developed with Ru-based B2 phases that are coherent and stable to 1300-1900 °C. Relationships between the different elemental additions, B2 solvus temperatures, B2 volume fractions, and B2 compositions were determined via annealing studies and subsequent SEM investigations. The effect of aging on alloy hardness and precipitate morphology are also presented. Consistent with precipitate evolution in nickel superalloys, the morphologies of the coherent Ru-B2 precipitates evolved from spherical to cuboidal to cuboidal arrays with increasing aging time.
||Planned: Metallurgical and Materials Transactions