Impact of N on the Stacking Fault Energy and Phase Stability of FCC CrMnFeCoNi
An Ab Initio Study
Yuji Ikeda (University of Stuttgart, Max-Planck-Institut für Eisenforschung)
F.H.W. Körmann (Max-Planck-Institut für Eisenforschung, TU Delft - Team Marcel Sluiter)
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Abstract
Interstitial alloying has become an important pillar in tuning and improving the materials properties of high-entropy alloys, e.g., enabling interstitial solid-solution hardening and for tuning the stacking fault energies. In this work we performed ab initio calculations to evaluate the impact of interstitial alloying with nitrogen on the fcc–hcp phase stability for the prototypical CrMnFeCoNi alloy. The N solution energies are broadly distributed and reveal a clear correlation with the local environments. We show that N addition stabilizes the fcc phase of CrMnFeCoNi and increases the stacking fault energy.
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