  An interatomic potential (termed EAM-21) has been developed with the embedded
atomic method (EAM) for CrFeMnNi quaternary HEAs. This potential is based on a
previously developed potential for CrFeNi ternary alloys. The parameters to
develop the potential were determined by fitting to experimental values,
density functional theory (DFT) and thermodynamic calculations, to reproduce
the main crystal characteristics, namely: the stability of the fcc phase,
elastic constants, and stacking fault energy. Its applicability for the study
of plastic deformation mechanisms was checked by calculations of behaviour of a
$< 110>\left \{1111 \right \}$ edge dislocation in equiatomic quaternary
CrFeMnNi alloy, as well as its less-complex subsystems (ternaries, binaries,
and pure metals). The calculations were performed in the domain of temperatures
between 0 and 900 K; smooth and stable glide of an edge dislocation and fcc
phase stability in this temperature range was confirmed. This study
demonstrates the suitability of the EAM-21 potential for the analysis of
plasticity mechanisms and mechanical properties of CrFeMnNi HEAs.
