EXPERIMENTAL AND THEORETICAL DETERMINATION OF HEAT CAPACITIES OF MODEL ALLOYS BASED ON FE-C-CR

1 DROZDOVÁ Ľubomíra
Co-authors:
1,2 SMETANA Bedřich 1,2 MACHŮ Mario 1,2 ZLÁ Simona 1,2,2 VONTOROVÁ Jiřina 1,2 VÁŇOVÁ Petra 1 ŘEHÁČKOVÁ Lenka 1,2,2 NOVÁK Vlastimil 1 KONEČNÁ Kateřina,PETLÁK Daniel 1 JAHODOVÁ Klára
Institutions:
1 Faculty of metallurgy and materials engineering, VŠB-Technical University of Ostrava, 17. listopadu 15, Ostrava-Poruba, 708 33, Czech Republic, EU lubomira.drozdova@vsb.cz
2 Regional material science and technology centre, VŠB-Technical University of Ostrava, 17. listopadu 15, Ostrava-Poruba, 708 33, Czech Republic, EU
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
63-68
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
37 views / 17 downloads
Abstract

Three model alloys based on Fe-C-Cr were studied. Alloys contained carbon of 0.34 wt% and chromium in a range of 0.92 – 4.76 wt%. Heat capacities were studied in a low and high-temperature region. The experimental heat capacities (“apparent heat capacities”) were obtained using Differential Scanning Calorimetry (DSC) with use of a continuous method. The Setaram MHTC (Multi High-Temperature Calorimeter) 96 with a3D DSC sensor was used for experiments with the use of the DSC method. Measurements were done in an inert atmosphere of pure argon by a heating rate of 5°C/min. The experimental data were compared and discussed with the calculation results using SW ThermoCalc with the use of the TCFE8.1 (Thermo-Calc Febased alloys) database. Structural and phase analysis was performed with the use of the Olympus IX70 optical microscope. There is not an unequivocal trend in increase or decrease of experimental heat capacities with increasing content of chromium in the temperature range of 457.15 – 1370.15 K. Experimentally obtained heat capacities decrease with increasing content of chromium except for phase transformations in the temperature range of 1371.15 – 1853.15 K.

Keywords: Fe-C-Cr alloys, DSC, heat capacity, Thermo-Calc
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