|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advances in Multi-Principal Elements Alloys X
||High throughput analysis of refractory Al-Nb-Ta-Ti-Zr high entropy alloys prepared as layered structures by field assisted sintering technique
||Dalibor Preisler, Josef Stráský, Jiří Kozlík, Michal Knapek, Miloš Janeček
|On-Site Speaker (Planned)
Refractory high entropy alloys (HEAs) is a prospective class of materials, consisting of multiple elements in similar atomic concentrations (5-35%). Their typical properties are high strength (both at room temperature as well as at elevated temperatures), creep resistance but they frequently suffer from limited room temperature ductility. This drawback can be potentially overcame by achieving the TRIP/TWIP effects in such materials. However, tuning of such effects in such large compositional space requires high throughput methods.
Al-Nb-Ta-Ti-Zr based HEAs were designed and manufactured via field assisted sintering technique by layering of elemental mixtures of the selected compositions. Structure of such multilayered samples was studied using scanning electron microscopy (SEM) and x-ray diffraction (XRD). Mechanical properties were evaluated by microhardness mapping and compression testing with in-situ measurement of acoustic emission, that is sensitive to twinning and stress-induced martensitic transformations. Deformation mechanisms were determined by SEM and XRD after compression tests.
||High-Entropy Alloys, High-Temperature Materials, Characterization