EXPERIMENTAL AND THEORETICAL DETERMINATION OF SPECIFIC HEATS, PHASE TRANSFORMATIONS TEMPERATURES AND ENTHALPY OF Fe-C-Cr-Ni ALLOWS

Knowledge of thermodynamical and thermophysical properties of materials plays an important role for many industrial applications. The paper is dedicated to the study of three model alloys based on Fe-C-Cr-Ni. The studied alloys contained carbon in a range of 0.33 – 0.36 wt%, chromium 1.08 – 4.70 wt% and nickel 1.04 – 4.96 wt%. Thermophysical and thermodynamical properties depending on the composition of alloys such as specific heats, phase transformations temperatures and enthalpy were studied in low and high temperature areas. Experimental data were obtained using following devices: Setaram Sensys Evo and Setaram MHTC Line 96 with 3D DSC sensors. Specific heats were obtained using the continuous method. All measurements were performed in a helium atmosphere. The same properties were calculated using SW Thermo-Calc, then were compared and discussed with experimental data.