Dear Colleagues,

Over the past two decades, new generations of alloys of great potential interest for various applications, requiring good mechanical behavior and resistance, have attracted increasing attention. Some examples include High-Entropy Alloys (HEAs) for medium/high temperatures (e.g., around 1000°C) and Refractory High-Entropy Alloys (RHEA) for very high temperatures (largely beyond 1000°C). These new alloys may potentially lead to versions capable of competing with superalloys and refractory alloys, which are currently used in aeronautics (turbine disks, turbine blades, etc.) power generation (burners, hot turbine components, etc.) and various processes working at high temperature (glass industries, etc.). Some HEAs contain equimolar quantities of several elements among Fe, Co, Ni, Cr, Mn, Cu, etc., while RHEA involves refractory metals such as Mo, Ta, W, Hf, Zr or Nb. Numerous fabrication ways are considered to elaborate them, from conventional foundry to powder metallurgy, to produce structural materials or coatings.

Due to the relative youth of these high-temperature alloy families, many systems combining the previous elements or introducing new ones have yet to be investigated in the fields of compositions and structures, synthesis mode or utilization temperature, as well as various mechanical, chemical, thermal and physical properties.

This Special Issue provides an opportunity to disseminate the newest results obtained by researchers in all the above-mentioned domains.

Prof. Dr. Patrice Berthod
Guest Editor

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• thermodynamic modeling
• casting
• powder metallurgy
• mechanical alloying
• forging
• microstructures
• high-temperature mechanics
• hot oxidation and corrosion
• other properties