Abstract
Compacted graphite iron (CGI) was subjected to high-temperature oxidation and subsequent thermal shock to investigate its oxidation and thermal cracking behavior. The two experiments were conducted to a maximum temperature of 650 °C in air. Mass changes and micro-observations were made during the experiments. Results showed that the oxidation kinetics of CGI followed the parabolic rate law approximately over three stages. The oxidation behavior of CGI showed special mechanism owing to the existence of graphite. The interconnected graphite structure contributed to the inner iron oxidation and decarburization through the graphite–matrix interface. It was found that thermal cracks always nucleated on the surface stress concentration areas. A mutually reinforcing effect was presented between thermal cracking and oxidation. In the thickness direction, the interconnected graphite-oxide network was detected, and it would act as the potential path for thermal crack propagation during subsequent thermal shock cycles.
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References
X. Wang, W. Zhang and B. Guo, Materials Science and Engineering A 609, 310 (2014).
Q. Zhang, Z. Zuo and J. Liu, Engineering Failure Analysis 34, 51 (2013).
R. Chen and W. Yuen, Oxidation of Metals 59, 433 (2003).
N. Birks, G. H. Meier and F. S. Pettit, Introduction to the High-Temperature Oxidation of Metals, 2nd edn. (Cambridge University Press & Higher Education Press, 2010).
H. D. Merchant, Oxidation of Metals 2, 145 (1970).
M. Lin, C. Wang and A. Volinsky, Oxidation of Metals 76, 161 (2011).
M. Garza, A. Artigas, A. Monssalve and R. Colas, Oxidation of Metals 70, 137 (2008).
D. Jedrzejczyk, M. Hajduga, and R. Lorek, High Temperature Oxidation as the Method of Surface Treatment of Cast Iron, METAL (Hradec nad Moravici, 13–15 May 2008).
H. T. Abuluwefa, R. I. L. Guthrie and F. Ajersch, Metallurgical and Materials Transactions A 28A, 1633 (1997).
M. Schutze, P. Tortorelli and I. Wright, Oxidation of Metals 73, 389 (2010).
M. Brady, G. Muralidharan, D. Leonard, J. Haynes, R. Weldon and R. England, Oxidation of Metals 82, 359 (2014).
F. Tholence and M. Norell, Oxidation of Metals 69, 13 (2008).
GB/T 5612-2008, Code for representing cast iron. (Chinese Standard)
X. Wang and W. Zhang, Mechanika 2, 90 (2016).
S. Ghodrat, M. Janssen, L. Kestens and J. Sietsma, Oxidation of Metals 80, 161 (2013).
X. Wang, W. Zhang and B. Guo, Journal of Materials Engineering and Performance 24, 2319 (2015).
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Wang, Xs., Zhang, Wz. Oxidation and Thermal Cracking Behavior of Compacted Graphite Iron under High Temperature and Thermal Shock. Oxid Met 87, 179–188 (2017). https://doi.org/10.1007/s11085-016-9664-6
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DOI: https://doi.org/10.1007/s11085-016-9664-6