In order to clarify the microstructure inhomogeneity of as-cast high-entropy alloy synthesised by vacuum arc melting, the microstructures, hardness, and chemical compositions of as-cast CrCuFeMnTi alloy have been investigated from the surface to the interior. The results show that obvious microstructure coarsening accompanied by a decrease in hardness occurred from the surface to the interior. The microstructures and hardness of CrCuFeMnTi alloy distributed relatively uniformly from the surface to the interior when the alloy was annealed at 500°C. The numerical fluctuation of the element distributions with the increase in depth also presented a more stable condition. In addition, electrochemical corrosion tests at different positions of the specimens further illustrated the effect of microstructure inhomogeneity on the corrosion tendency and rate.
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