Absence of long-range chemical ordering in equimolar FeCoCrNi

By M. Lucas, G. Wilks, L. Mauger, J. Muñoz, Oleg N. Senkov, E. Michel, J. Horwath, S. Semiatin, M. Stone, D. Abernathy and 1 more. 2012

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Solid-Solution CrCoCuFeNi High-Entropy Alloy Thin Films Synthesized by Sputter Deposition (2015, background): “Therefore, some ordered phases, such as FeNi3 ordered structure,[29] will be invisible to the XRD.”
Searching for Next Single-Phase High-Entropy Alloy Compositions (2013, methodology): “The FCC alloys, including CoCrFeNi [5] and CoCrFeMnNi [2], are based on 3d transition metals.”
A critical review of high entropy alloys and related concepts (2016, background): “Early statements that atoms are randomly distributed [5] have not been verifiede the large number of elementsmakes this a daunting experimental challenge [51].”
High-Entropy Alloys: A Critical Review (2014, background): “[7–13] Here we demonstrate this effect with Figure 1, which shows the XRD patterns of a series of binary to septenary alloys.”
Structural-disorder and its effect on the mechanical properties in single-phase TaNbHfZr high-entropy alloys (2015, background): “At high enough temperatures, this high entropic contribution to the Gibbs free energy of a HEA suppresses the formation of intermetallics and stabilizes a simple on average body-centered or face-centered cubic (bcc and fcc) phase [2, 3].”
The search for high entropy alloys: A high-throughput ab-initio approach (2017, unknown): “CoCrFeNi fcc 1,600 1,000 1,720 a 47 fcc [48, 49]”