dilatometry Analysis of FeCCrNi based systems

Abstract

Three model alloys based on Fe-C-Cr-Ni were studied. Alloys contained 0.34 -0.36 wt. % of carbon and chromium and nickel in the range of 1.04 -4.96 wt. %. Thermal expansion coefficient and density were studied in the temperature range of 200 -1600 °C. Temperatures of phase transformations in the low and high-temperature area were evaluated too. The experimental data were obtained using dilatometry. The NETZSCH DIL 402 Expedis Supreme with NanoEye, the optoelectrical displacement system, was used for experiments. Measurements were done in an inert atmosphere of pure helium by a heating rate of 10 °C/min. The experimental data were compared and discussed with the calculation results using SW Thermo-Calc with implemented Fe-based alloys database TCFE8.1 and SW JMatPro with implemented General steel database. The influence of various contents of chromium and nickel was studied.