Iron-rich High Entropy Alloys

The design of iron-rich high-entropy alloys is discussed. Both substitutional and interstitial alloying elements are considered. The study of iron-rich high-entropy alloys by computational simulations based on alloy theory such as thermodynamic modeling and density functional based studies of alloy energetics and alloy excitations as well as the wide range of experimental techniques for synthesis, processing, and characterization of high-entropy alloys are reviewed. It is shown that by optimizing the alloy composition, while maintaining a high iron content, it is possible to utilize mechanisms that are highly effective in advanced steels, such as transformation- and twinning-induced plasticity and grain refining, to achieve superior mechanical properties. An outlook for further iron-rich alloy development concludes the chapter.