|About this Abstract
||1st World Congress on High Entropy Alloys (HEA 2019)
||High Entropy Alloys 2019
||High Energy Synchrotron Radiation X-ray Diffraction Measurements on Al<sub>0.3</sub>CoCrFeNi High Entropy Alloy during in situ Annealing
||Christopher R. Reynolds, Deep Choudhuri, Zachary Herl, Marcus Young, Jeffrey Lloyd
|On-Site Speaker (Planned)
||Christopher R. Reynolds
High entropy alloys (HEAs) offer the ability to tailor microstructures based on specific properties. One family of alloys of interest is Al<sub>x</sub>CoCrFeNi, where x varies from 0.0 to 2.0 wt. %, here specifically Al<sub>0.3</sub>CoCrFeNi HEA. The purpose of our study is to compare phases observed using high energy synchrotron radiation X-ray diffraction measurements during in situ annealing with the equilibrium phases predicted by the phase diagram generated using CALPHAD. The Al<sub>0.3</sub>CoCrFeNi HEA sample was cold rolled and then in situ annealed, which consisted of heated to 800 °C, held for three hours, and then cooled back down. In addition to examining the phase changes with temperature, the crystal lattice strains associated with temperature changes are also presented and compared with scanning electron microscopy images of the sample at the various stages of processing. In this context, the phase evolution and dissolution are discussed and compared with the CALPHAD predictions.