|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||High Entropy Alloys IV
||Computational High-Entropy Alloy Design and Phase Equilibria of an Al-Co-Cr-Fe-Ni System
||Zhi Tang, Oleg N. Senkov, Jonathon D. Poplawsky, Chuan Zhang, Fan Zhang, Carl D. Lundin, Peter K. Liaw
|On-Site Speaker (Planned)
Based on the computational strategy, three alloys, including a single-phase alloy (Al0.3CoCrFeNi), a precipitation-hardened alloy (Al0.5CoCrFeNi), and a duplex alloy (Al0.7CoCrFeNi), were designed and developed. The hardness and tensile properties of these alloys were investigated and compared with published results. Furthermore, phase equilibria were achieved by carefully annealing the alloys at 1250 oC for 1000 hours. The equilibrium microstructure was characterized by optical light microscopy (OLM), electron backscatter diffraction (EBSD), atom probe tomography (APT), and X-ray diffraction (XRD). The results were compared with the HEA database to provide pertinent experimental data to refine the database. It is also the authors’ hope that the present study sets up an example to provide a strategy to explore and develop new HEAs by integrating high-throughput computational and experimental techniques. APT was conducted at ORNL's Center for Nanophase Materials Sciences (CNMS), which is a U.S. DOE Office of Science User Facility.
||Planned: A print-only volume