|About this Abstract
|2022 TMS Annual Meeting & Exhibition
|Phase Transformations and Microstructural Evolution
|Coarsening Behavior of Hierarchical B2 Precipitates in a High Entropy Alloy
|Subhashish Meher, Thomas M Lillo
|On-Site Speaker (Planned)
An experimental approach has been used to explore a hierarchical structure at nanoscale for enhanced coarsening resistance of ordered B2 precipitates in a high entropy alloy. The hierarchical microstructure formed in this alloy is composed of a body centric cubic (BCC) matrix with B2 precipitates that contain embedded, spherical BCC precipitates, which coarsen during high-temperature annealing but do delay coarsening of the larger B2 precipitates. The experimental results uniquely demonstrated the pathways of precipitate coalescence that were captured on electron microscopy results. Chemical mapping via atom probe tomography suggests the possible routes of origin of such structural hierarchy that can give insights to future hierarchical materials fabrication.
|High-Entropy Alloys, Characterization, High-Temperature Materials