|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advances in Multi-Principal Elements Alloys X
||A High-throughput Strategy to Study Phase Stability, Microstructure Development and Mechanical Properties in Complex Concentrated Alloys
||Mu Li, Zhaohan Zhang, Katharine Padilla, Rohan Mishra, Katharine M. Flores
|On-Site Speaker (Planned)
||Katharine M. Flores
The design of high entropy alloys often focuses on identifying equiatomic solid solution alloys; expanding these complex concentrated alloys (CCAs) to include multiphase microstructures offers the opportunity to further enhance and control properties. Designing such multiphase CCAs requires the ability to efficiently survey compositional space for phases and microstructures of interest using integrated experimental and computational methods. Here, we present a laser deposition-based high-throughput method to synthesize compositional and microstructural libraries, and compare the experimentally observed structures with predictions based on first-principles calculations. We have selected Nb-V-Zr as a model base, and evaluate the influence of additional refractory alloying elements, with a focus on near-equiatomic fractions. Mechanical behavior as a function of composition and microstructure is evaluated via nanoindentation at temperatures up to 800°C. This work provides guidelines for predicting compositional effects on microstructure and properties, which will accelerate the design of CCAs for high-temperature applications.