Regulating the strength and ductility of a cold rolled FeCrCoMnNi high-entropy alloy via annealing treatment

An equiatomic FeCrCoMnNi high-entropy alloy was processed by cold rolling and then isochronous annealing treatments. The dependence of the tensile properties and microstructure of the alloy on the annealing temperature was investigated. Long-range ordered structure, Cr-rich precipitates, heterogeneous structure with different recrystallization degrees, and homogeneous structure with different grain sizes can be obtained via regulating the annealing temperature. It is operable to obtain optimal microstructure of the alloy and thus beneficial to the mechanical properties by varying the annealing temperature. This work provides a new concept to fabricating FeCrCoMnNi alloy with a combination of high strength and large ductility.