The stacking fault energies of 10 austenitic steels were determined at 50 to 600K by means of thermodynamic modelling of the Fe–Cr–Ni–Mn–Al–Si–Cu–C–N system using a modified Olson-Cohen modelling approach. The applied model accounts for each element’s contribution to the Gibbs energy, the first-order excess free energies, magnetic contributions and the effect of interstitial nitrogen. Experimental stacking fault energies values from X-ray diffraction measurements were used for comparison. The effect of the stacking fault energy upon deformation mechanisms was also studied by electron back-scattering diffraction.

Thermodynamic Modeling of the Stacking Fault Energy of Austenitic Steels. S.Curtze, V.T.Kuokkala, A.Oikari, J.Talonen, H.Hänninen: Acta Materialia, 2011, 59[3], 1068-76