|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Microstructural Templates Consisting of Isostructural Ordered Precipitate / Disordered Matrix Combinations: Microstructural Evolution and Properties
||Optimizing Composition and Microstructure in Compositionally Complex Alloys Possessing bcc and B2 Mixtures
||Zachary T. Kloenne, Brian A. Welk, Kamalnath Kadirvel, G. Babu Viswanathan, Jean-Philippe Cousinie, Yunzhi Wang, Hamish L. Fraser
|On-Site Speaker (Planned)
||Hamish L. Fraser
In several compositionally complex alloys (CCA), a microstructure is exhibited that includes mixtures of a bcc phase and the ordered B2 compound, and which often resembles that of Ni-base superalloys. The present study has involved an assessment of whether these new alloys offer a promise for intermediate and high temperature applications. The research has involved three aspects. In the first, the transformation pathway responsible for the development of microstructures has been determined using a combination of phase field modeling and microstructural characterization. In the second, the nature of the B2 phase has been studied, involving a determination of the site occupancy in the sub-lattices of the B2 compound, using spatially-resolved energy dispersive spectroscopy (XEDS). In the third, the nature of the interfaces between the ordered and disordered phases has been fully characterized using aberration-corrected (S)TEM, and the nature of slip transmission through these interfaces has been studied.