Proceedings of the International Conference on Modern research in Engineering,Technology & Science
Year: 2019
DOI: https://www.doi.org/10.33422/icmets.2019.03.208
The Microstructure and Mechanical Properties of Novel (Co40Cr10Fe30Nb10Ni10)92Al8 Eutectic High Entropy Alloy
Ozcan Akin, Gasan Hakan and Celik Osman Nuri
ABSTRACT:
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.