The Oxidation of the HiSiMo Cast Irons Alloyed with Cr/Al at 800 °C
Abstract
To improve the oxidation resistance of cast iron containing Si and Mo (HiSiMo), 1wt.% Cr and 3wt.% Al were added into the base alloy to improve high temperature oxidation resistance for exhaust manifold applications. Oxidation tests were performed in both dry and wet air (air + 10% H2O) at 800 °C for 1, 10, 24, and 50 h. The mass change and oxide thickness were measured to evaluate the oxidation resistance. Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDS) and transmission electron microscopy (TEM) were employed to characterize the oxidized samples. The results showed that the additions of Al or Cr selectively oxidized to form a more oxidation resistant surface oxide layer, which reduced the mass gain during these experiments.
Recommended Citation
W. Zhu et al., "The Oxidation of the HiSiMo Cast Irons Alloyed with Cr/Al at 800 °C," Oxidation of Metals, vol. 97, pp. 441 - 449, Springer, Mar 2022.
The definitive version is available at https://doi.org/10.1007/s11085-022-10098-3
Department(s)
Materials Science and Engineering
Keywords and Phrases
Cast iron; HiSiMo; Oxidation; TEM
International Standard Serial Number (ISSN)
1573-4889; 0030-770X
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2022 Springer, All rights reserved.
Publication Date
04 Mar 2022
Comments
The authors would like to thank the financial support by the US Department of Energy, Office of Energy Efficiency and Renewable Energy (Vehicle Technologies Office, Propulsion Materials Program) under Award No. DE-EE0008458.