Superplasticity in Severely Deformed High-Entropy Alloys

High-entropy alloys (HEAs) containing five or more principal elements (each elemental concentration between 5 and 35 at%) with a relatively simple structure have attracted much attention during the last two decades.1-3) These alloys with high-mixing entropy promote the formation of random solid solutions with desirable properties. HEAs are very attractive materials due to their potential promising properties such as high strength, high thermal stability and oxidation resistance which offer many potential applications in various stimulated in order to carry out research in the processing, characterization and application of HEAs. However, many experimental investigations together with thermodynamic predictions based on calculations of the phase diagrams reveal decomposition of the single-phase concentrated solidpacked phases such as eta and sigma phases, respectively, may have an intermetallic character which is generally considered to provide high strength at the expense of a that these materials reveal sluggish diffusion which provides position procedure kinetically. processing that has been used to apply a very high strain to