Special Issue "Recent Advancements in the Field of High Entropy Alloys (HEAs)"

Dear Colleagues,

This Special Issue aims to collect state-of-the-art original research work, short communications or comprehensive review papers in the field of high-entropy alloys (HEAs), focused on innovative materials and processing techniques which will be fundamental to address ] recent developments in this field.

Exploring new materials is a never-ending process in the development of human civilization. In this venture, many different materials, particularly alloys, have been discovered. HEAs are quite different in comparison to traditional alloys based on one or two principal elements as they have one striking characteristic, which is the unusual high entropy of mixing. They generally display five recognized performance characteristics: strength-plasticity trade-off breaking, irradiation tolerance, corrosion resistance, high impact toughness within a wider temperature range, and high thermal stability. So far, the development of HEAs has gone through various stages, and more involved research on the recent advancements of HEAs is urgently required.

HEAs are composed of at least five principal metallic elements, with these components having a molar atomic proportion between 5% and 35%. Most HEAs comprise a simple FCC, BCC, or HCP solid solution phase. These solid solution phases with little or no intermetallic matrix help HEAs to achieve outstanding properties, such as strength, extraordinary mechanical and physical properties at cryogenic temperatures, plastic strain, fracture strength, and good ductility. HEAs exhibit elevated-temperature oxidation resistance and excellent work hardenability. Furthermore, HEAs are exceptional refractory materials.

Particularly, this Special Issue will address topics ranging from exploring the microstructures of HEAs via experiments to revealing the structure–performance correlation. These will provide new methods to solve challenging problems and open up new possibilities for this emerging research field.

Therefore, this Special Issue is focused on contributions related to recent advancements in the design, synthesis, characterization, and applications of HEAs based on experimental and theoretical studies. We aim for this issue to be a forum for disseminating research findings as well as sharing innovative ideas in this field.

Dr. Swadipta Roy
Dr. Manojit Ghosh
Guest Editors

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• high-entropy alloys (HEAs)
• CALPHAD
• synthesis
• characterization
• microstructure
• structure–property relation
• applications