Composition, Structure, Properties Relations in Compositionally Complex and High-Entropy Alloys

Dear Colleagues,

The metallurgy of high-entropy and compositionally complex alloys is a rapidly growing field. The amount of experimental, thermodynamic, and theoretical information demonstrates the extensive growth in the area during the past several years. The high-entropy approach has been adopted not only in alloy development, but also in other fields of solid-state materials research. The rapid development of the field requires an understanding of the fundamental properties of model high-entropy alloy systems in order to enable us to shift our attention from an exploration of new compositions using trial-and-error search as well as systematic and high-throughput screenings to a development of industry-relevant functional systems for their further applications.

The main recent trends in high-entropy alloy design include the involvement of as many as possible elements as principle components including rare and refractory metals; application of phase diagram modelling to design single- and dual-phase alloys with promising properties; developing an understanding of high-entropy alloys’ stability and transformations under mechanical, thermal, chemical, and pressure impact; application of complementary techniques such as in situ transmission electron microscopy, X-ray diffraction, and spectroscopy to characterise real structure, properties, and stability of multicomponent alloys under working conditions; and screening for the broader applications of high-entropy and compositionally complex alloys as superconductive, multiferroic, and especially catalytic materials.

This Special Issue welcomes original research papers and reviews on all aspects of high-entropy and compositionally complex alloys, with a special focus on their real structure and phase transformations under temperature, pressure, and mechanical impacts, as well as the construction and modelling of multicomponent phase diagrams to access new insights into the composition–structure–properties relations in multicomponent compositionally complex alloys. Submissions are especially welcomed which might open a door to novel routes for high-entropy alloy preparation, including high-throughput and operando approaches, as well as those that might reveal new frontiers in their applications.

Dr. Kirill V. Yusenko
Guest Editor

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