Proceedings of the International Conference on Modern research in Engineering,Technology & Science
The Microstructure and Mechanical Properties of Novel (Co40Cr10Fe30Nb10Ni10)92Al8 Eutectic High Entropy Alloy
Ozcan Akin, Gasan Hakan and Celik Osman Nuri
The eutectic high entropy alloys (EHEAs) containing the Laves phase offering a great promise for high-temperature applications due to the excellent high-temperature behaviors of the Laves phases. However, a trial-error approach is not an available method for determining eutectic composition in multi-component systems. In this study, 680 pseudo-binary phase diagrams at different composition ranges were calculated using the ThermoCalc software and TCHEA2 database to determine the eutectic reactions in the AlCoCrFeNbNi system. To achieve a simultaneous enhancement in ductility and strength, one of the eutectic alloy composed of a ductile face-centered cubic (FCC) phase and a hard Laves phase were examined. The experimental results show that the as-cast (Co40Cr10Fe30Nb10Ni10)96Al4 EHEA composed a very fine laminar structure and exhibit high compession yield strength.
Keywords: Eutectic High Entropy Alloys; XRD; SEM; Rietveld Analysis.