|About this Abstract
||3rd World Congress on High Entropy Alloys (HEA 2023)
||A High Throughput CALPHAD Method of Designing Low Density, Compositionally-complex Alloys Toward Understanding Lightweighting Elements' Effects on Passivity
||Peter Connors, John R Scully
|On-Site Speaker (Planned)
The emergence of compositionally-complex alloys (CCAs) as a new frontier of corrosion-resistant alloys has opened doors for advanced optimization of the usage of corrosion-resistant elements for promoting passivation of each phase and self-healing. However, researchers must contend with a design space unfathomable in compositional and microstructural possibilities. In this work, a methodology for the rapid (~1 alloy/second) testing of alloy compositions for desired phase stability using the CALPHAD approach is presented. This approach utilizes equilibrium information of a composition at its solidus temperature to maximize the probability of discovering an alloy with a disordered matrix-(or single-)phase microstructure. Additionally, for multi-phase alloy design, this approach engineers the distribution of passivating elements throughout the predicted microstructure and interfacial area between phases of interest. Alloys with constant phase compositions and variable area fractions are evaluated. A system discovered using this technique is explored toward understanding lightweight, passivating elements’ effects on overall passivation.
||Planned: Metallurgical and Materials Transactions