Effect of heat treatment on CrMnFeNi2Cu2Ti0.1 high entropy alloy influence of microstructure and properties

Abstract

CrMnFeNi2Cu2Ti0.1 high entropy alloy was prepared by vacuum melting, and its microstructure and mechanical properties were measured. At the same time, the effect of different annealing temperature on the microstructure and properties of high entropy alloy was studied, and the relationship between annealing temperature, microstructure and mechanical properties was explored. The experimental result showed that there existed one BCC phase and two kinds of FCC phase in the as-cast samples, and the content of BCC phase reduced gradually with the increase of annealing temperature. From the SEM observation resulted, it could be seen that the main structure of the as-cast sample was a dendritic structure. With increasing the annealing temperature, the FCC phase in the alloy increased, and the dendrites were gradually broken, finally a cluster-like structure was formed. Otherwise, the yield strength of the alloy gradually increased, and the hardness of the alloy showed a trend of growth followed by decline and then growth.