Structure and mechanical properties of high-entropy Fe-Ni-Mn-Cr alloy subjected to HPT

Abstract

The structure and mechanical properties of high-entropy Fe-Ni-Mn-Cr alloy subjected to high pressure torsion have been investigated in this paper. Transmission electron microscopy and X-ray diffraction were used to study the structure (grain size, twins, particles and crystallographic texture). The tensile properties of ultrafine-grained samples were determined. The contributions of grain boundaries, twins, particles, dislocations and solid solution strengthening to the formation of a high strength in an ultrafine-grained high-entropy alloy are discussed.