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- W2023142986 abstract "First-principles density-functional theory calculations for C solution enthalpies, ${H}^{text{sol}}$, and diffusion activation enthalpies, ${H}^{text{diff}}$, in body-centered-cubic Fe and Cr are presented. The results for C in Fe compare well with experiments, provided that the effect of magnetic disordering is accounted for. Likewise, in Cr, the calculated ${H}^{text{sol}}$ and ${H}^{text{diff}}$ agree well with available experiments. In both materials, the deviation between calculated enthalpies and critically assessed experimental enthalpies are less than 0.05 eV. Further, first-principles calculations for the interaction energies between a solute (e.g., a Cr atom in bcc Fe) and an interstitial C atom are presented. The results are in conflict with those inferred from internal friction (IF) experiments in disordered Fe-Cr-C alloys. A simple model of C relaxation in disordered Fe-Cr is used to compare theoretical and experimental IF curves directly. The results suggest that a more extensive study of the energetic, thermodynamic, and kinetic aspects of C migration in Fe-Cr is needed." @default.
- W2023142986 created "2016-06-24" @default.
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- W2023142986 date "2008-09-23" @default.
- W2023142986 modified "2023-10-10" @default.
- W2023142986 title "Carbon impurity dissolution and migration in bcc Fe-Cr: First-principles calculations" @default.
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- W2023142986 doi "https://doi.org/10.1103/physrevb.78.094110" @default.
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