High-Entropy Materials: Challenges and Prospects II

Dear Colleagues,

As a family of newly emerged structural materials, high-entropy alloys (or multicomponent alloys or compositionally complex alloys) are drawing extensive attention from materials scientists. These alloys are of great interest, firstly, because they bring about the possibility of developing a greater amount of alloy species than ever before. Secondly, many extraordinary mechanical properties are being uncovered in these alloys, for example, excellent and easily tailorable strength, ductility, temperature tolerance, and fatigue and fracture resistance. From these perspectives, high-entropy alloys are very promising for next-generation structural materials. Therefore, in the past decade, worldwide efforts have been devoted to various aspects of high-entropy alloys, including synthesizing alloys with different microstructures and properties, appreciating their physical–metallurgy principles, and evaluating their mechanical properties such as creep, fracture, and fatigue properties. Undoubtedly, these efforts have led to many major accomplishments. However, important challenges still exist. Examples include establishing sound metallurgy physics of high-entropy alloys, clarifying their deformation and strengthening mechanisms and understanding how and why they are distinct from conventional crystalline alloys, and developing promising alloy systems such that they are practically applicable (for example, the density of refractory high-entropy alloys need to be reduced in order for their high-temperature applications as super alloys).

As the research in high-entropy alloys moves on, researchers in this field should be well aware of the challenges and prospects ahead. This Special Issue intends to offer a dedicated platform for sharing new findings and communicating views about the past accomplishments and future directions in high-entropy alloy research. We welcome reviews and original research articles in the areas of physical metallurgy, microstructures, and mechanical properties of high-entropy alloys, achieved either by experimental techniques or theoretical calculations.

Dr. Weidong Li
Prof. Dr. Peter K. Liaw
Guest Editors

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• high-entropy alloys
• physical metallurgy
• microstructures
• mechanical properties
• theoretical calculations

• High Entropy Materials: Challenges and Prospects in Metals (9 articles)