Single-phase high-entropy alloys – A critical update

By W. Steurer. 2020

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Abstract Maximization of the configurational entropy – this has been the magic formula promising thousands or even millions of intermetallic multiple-principal-element solid solutions with potentially novel physical and/or mechanical properties. What has been left of this dream fifteen years after the first publication on high-entropy alloys (HEAs)? So far, intermetallic single-phase HEAs have been identified in ≈80 quaternary, quinary and senary intermetallic systems, only. With a few exceptions their not so unexpected physical properties are mainly determined by the average of the properties of the constituents. The, in some cases, exceptional mechanical properties have been related to lattice distortions and/or local clustering. In the following, I will give an update of the development in this area over the past five years. The main focus will lie on the synthesis of HEAs, their phase stability and characterization from a crystallographic point of view.

Subfields: Aerospace Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/8e7d412b09024542a6316ec2102c6ab2870da58c