|About this Abstract
||3rd World Congress on High Entropy Alloys (HEA 2023)
||Deformation Behavior and Damage Evolution in AlCoCrFeNi2.1 Eutectic High Entropy Alloys
||Cal D. Siemens, Jidong Kang, David S. Wilkinson
|On-Site Speaker (Planned)
||Cal D. Siemens
The AlCoCrFeNi2.1 eutectic HEA (EHEA) is a duplex casting alloy exhibiting high strength and moderate ductility. However, there is currently little work published on mechanisms controlling damage and fracture for this EHEA. A series of EHEAs were fabricated including as-cast and hot rolled variants, plus one with increased Fe content (termed the Fe-EHEA). In-situ techniques involving micro-digital image correlation and x-ray computed tomography were used to characterize the distribution of deformation and damage evolution at the microscale while under strain. These methods were paired with scanning electron microscopy and fracture toughness measurements to determine phase composition and defect sensitivity. Micro-crack nucleation and early strain localization were found to be controlling fracture mechanisms for the cast alloys. The Fe-EHEA was found to exhibit improved phase co-deformation and elongation to fracture, while maintaining tensile strength, when compared to the base EHEA composition. This work showcases fine-tuning HEA composition to tailor mechanical properties.
||Planned: Metallurgical and Materials Transactions