|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Advanced Characterization of High-temperature Alloys: Phase Evolution during Manufacturing and Service-induced Deformation
||Microstructure Evolution and Deformation Micromechanisms in Refractory High Entropy Superalloys
||Muhammad Awais, William Hixson, Howard Stone, Nicholas Jones, Ke An, Dunji Yu, Raj Banerjee, James Coakley
|On-Site Speaker (Planned)
Refractory high entropy superalloys (RSAs) are being pursued heavily due to their high temperature capabilities with the goal of stabilizing a microstructure resembling the well-known γ-γ’ Ni superalloy microstructure but with a disordered bcc matrix (A2) strengthened by ordered bcc precipitates (B2). However, there is still a lack of understanding of these compositionally complex materials and fundamental knowledge regarding deformation micromechanics and precipitation pathways must be realized quickly to be able to use RSAs in future generation engines.
Room temperature and elevated temperature in-situ elastic and plastic deformation neutron diffraction measurements have been performed in order to determine phase elastic constants required for simulation (e.g. precipitate evolution) and to examine the phase stability and fundamental strengthening mechanisms within an A2 + B2 microstructure alloys for the first time. Supporting transmission electron microscopy will also be presented.
||High-Temperature Materials, High-Entropy Alloys, Mechanical Properties