Dear Colleagues,

High-entropy alloys are a relatively new class of alloy, which do not possess one principle element as the basis for the alloy; instead, they have highly complex chemistries and often contain more than five elements in large percentages. These complex chemistries have revealed a range of new and very exciting properties in high-entropy alloys, making them of interest in a range of different applications. For example, some high-entropy alloys have extremely good high-temperature properties, behaving almost like a refractory. Others have been shown to have excellent corrosion properties. Wear is also an area in which high-entropy alloys are receiving a lot of research interest, with their properties exceeding comparable alloy microstructures. The cryogenic properties of high-entropy alloys have also been found to be exceptional. Since high-entropy alloy development is still relatively new, there is also really exciting fundamental work to be carried out in this field, for example: the effect of chemical segregation on the properties; the atomic scale arrangement in these chemically complex alloys, the kinetics of phase transformations, the diffusivity of different species in these complex crystal structures, and how dislocations move through such a complex local environment, just to name a few. So, it can be seen that, both experimentally and computationally, there is a lot of interesting and important work being carried out in the field of high-entropy alloy development. We have therefore dedicated this Special Issue to high-entropy alloys and welcome the submission of papers on this new alloy class. Papers focusing on alloy chemistry, experimental measurement of properties, theoretical calculations, and advanced characterization of high-entropy alloys are all welcome.

Prof. Dr. Peter Hodgson
Prof. Dr. Daniel Fabijanic
Dr. Jithin Joseph
Guest Editors

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• high-entropy alloys
• microstructure
• deformation
• corrosion
• wear