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Journal of Thermal Analysis and Calorimetry

, Volume 111, Issue 2, pp 1203–1210 | Cite as

Experimental study of Fe–C–O based system below 1000 °C

  • Monika ŽaludováEmail author
  • Bedřich Smetana
  • Simona Zlá
  • Jana Dobrovská
  • Vlastimil Vodárek
  • Kateřina Konečná
  • Vlastimil Matějka
  • Petra Matějková
Article

Abstract

The paper deals with the study of phase transformation temperatures of Fe (Fe–C–O) based metallic alloys. Six model alloys with graded carbon and oxygen content were used for experimental investigation. Low-temperature region (<1000 °C) was the investigated area. Phase transformation temperatures were obtained using Differential thermal analysis and Setaram Setsys 18TM laboratory system. Controlled heating was conducted at the rates of 2, 4, 7, 10, 15, 20 °C min−1. Region of eutectoid transformation (Feα(C) + Fe3C → Feγ(C)), alpha–gamma (Feα(C) → Feγ(C)) and transformation Feα(O) + Fe0.92O → Feγ(O) + Fe0.92O was studied. New original data (phase transformation temperatures) were obtained in this study. The relationship between shift of phase transformation temperatures and chemical composition (mainly carbon and oxygen content) is investigated in this paper. To achieve good approximation to the equilibrium conditions, the extrapolation of the obtained phase transformation temperatures to the zero heating rate was performed. The influence of experimental conditions (heating rate) on temperatures of phase transformations was studied as well. Comparison of the obtained experimental data with the data presented in the accessible literature and IDS calculations (Solidification Analysis Package) was carried out. It follows from literature search that there is a lack of thermo-physical and thermo-dynamical data on Fe–C–O system.

Keywords:

Fe–C–O system DTA Transformation temperatures Zero heating rate 

Notes

Acknowledgements

The study was carried out in the scope of the projects of the Czech Science Foundation (107/11/1566 and 106/08/0606) and the project No. CZ.1.05/2.1.00/01.0040 “Regional Materials Science and Technology Centre” within the frame of the operation programme ‘Research and Development for Innovations’ financed by the Structural Funds and from the state budget of the Czech Republic and of the student’s project entitled ‘Selected studies of heterogeneous systems’ (SP2011/17), and it was financed from the specific research resources of the Faculty of Metallurgy and Materials Engineering, VSB-Technical University of Ostrava, Czech Republic.

References

  1. 1.
    Villars P, Okamoto H, Cenzual K (2006) ASM Alloy Phase Diagrams Center. ASM International, Materials Park, OH. http://www1.asminternational.org/AsmEnterprise/APD
  2. 2.
    Raju S et al. (2010) Drop calorimetry studies on 9Cr-1 W-0.23 V-0.06Ta-0.09C reduced activation steel. Int J Thermophys. doi: 10.1007/s10765-010-0720-1
  3. 3.
    Ryš P, Cenek M, Mazanec K, Hrbek A (1975) Material science I, Metal science 4, 1st edn. ACADEMIA, PrahaGoogle Scholar
  4. 4.
    Sundman B (1991) An assessment of the Fe–O system. J Phase Equilib. doi: 10.1007/BF02645709
  5. 5.
    Smetana B et al. (2010) Phase transformation temperatures of pure iron and low alloyed steels in the low temperature region using DTA. Int J Mater Res. doi: 10.3139/146.110283
  6. 6.
    Cabrera-Marrero JM et al. (1998) Macro-micro modeling of the dendritic microstructure of steel billets processed by continuous casting. ISIJ Int. doi: 10.2355/isijinternational.38.812
  7. 7.
    Emadi D et al. (2005) Applications of thermal analysis in quality control of solidification processes. J Therm Anal Calorim. doi:  10.1007/s10973-005-0772-9
  8. 8.
    Miettinen J (1999) Solidification analysis package for steels—user’s manual of DOS version, 1st edn. Helsinky University of Technology, HelsinkyGoogle Scholar
  9. 9.
    Miettinen J (1996) Calculation of solidification-related thermophysical properties for steels. Metall Mater Trans B. doi: 10.1007/s11663-997-0095-2
  10. 10.
    Boettinger WJ, et al. DTA and heat-flux DSC measurements of alloy melting and freezing. 1st ed. Washington: National Institute of Standards and Technology; 2006.Google Scholar
  11. 11.
    Gallagher PK. Handbook of thermal analysis and calorimetry: principles and practice. 2nd ed. Oxford: Elsevier; 2003.Google Scholar
  12. 12.
    Wriedt HA (1991) The Fe–O (iron–oxygen) system. J Phase Equilib. doi: 10.1007/BF02645713
  13. 13.
    Bjorkman B (1985) An assessment of the system Fe–O–SiO2 using a structure based model for the liquid silicate. CALPHAD. doi: 10.1016/0364-5916(85)90012-4
  14. 14.
    Petrovič DS et al. (2011) Differential scanning calorimetry study of the solidification sequence of austenitic stainless steel. J Therm Anal Calorim. doi: 10.1007/s10973-011-1375-2
  15. 15.
    Kempen ATW, Sommer F, Mittemeijer EJ (2002) The kinetics of the austenite-ferrite phase transformation of Fe–Mn: differential thermal analysis during cooling. Acta Mater. doi: 10.1016/S1359-6454(02)00149-0
  16. 16.
    Zhao JC. Methods for phase diagram determination. 1st ed. Oxford: Elsevier; 2007.Google Scholar

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2012

Authors and Affiliations

  • Monika Žaludová
    • 1
    Email author
  • Bedřich Smetana
    • 1
  • Simona Zlá
    • 1
  • Jana Dobrovská
    • 1
  • Vlastimil Vodárek
    • 2
  • Kateřina Konečná
    • 2
  • Vlastimil Matějka
    • 3
  • Petra Matějková
    • 3
  1. 1.Faculty of Metallurgy and Materials Engineering, Department of Physical Chemistry and Theory of Technological ProcessesVŠB-TU OstravaOstrava-PorubaCzech Republic
  2. 2.Faculty of Metallurgy and Materials Engineering, Department of Materials EngineeringVŠB-TU OstravaOstrava-PorubaCzech Republic
  3. 3.Nanotechnology CentreVŠB-TU OstravaOstrava-PorubaCzech Republic

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