Atomic-size and lattice-distortion effects in newly developed high-entropy alloys with multiple principal elements

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Hume-Rothery for HEA classification and self-organizing map for phases and properties prediction (2017, methodology): “Thus, more complex methods using other characteristics and parameters other than entropy of mixing and mismatch were proposed including lattice distortion, hardness and the total (VEC) or reduced (e/a) number of valence electrons [21-29].”
Thermodynamics of concentrated solid solution alloys (2017, background): “Furthermore, some empirical rules have been determined based on limited number of compositions [16,18,21,22].”
High-entropy alloys: a critical assessment of their founding principles and future prospects (2016, methodology): “Others have used alternative means of comparison – for instance, Singh et al.173 have suggested the use the parameter L = DSmix/d2, while Wang et al.266,271 replaced δ with a new parameter for the measure of atomic size mismatch, arguing that δ does not distinguish effectively enough between systems”