The Oxidation of the HiSiMo Cast Irons Alloyed with Cr/Al at 800 °C

Wenhui Zhu; Bruce A. Pint; Yang Huo; Larry Godlewski; Bita Ghaffari; Simon Lekakh; Carlos Engler-Pinto; Mei Li

doi:10.1007/s11085-022-10098-3

The Oxidation of the HiSiMo Cast Irons Alloyed with Cr/Al at 800 °C

Wenhui Zhu, Bruce A. Pint, Yang Huo, Larry Godlewski, Bita Ghaffari, Simon Lekakh, Carlos Engler-Pinto, Mei Li

Materials Science and Technology Div

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

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.

Original language	English
Pages (from-to)	441-449
Number of pages	9
Journal	Oxidation of Metals
Volume	97
Issue number	3-4
DOIs	https://doi.org/10.1007/s11085-022-10098-3
State	Published - Apr 2022

Bibliographical note

Publisher Copyright:
© 2022, Springer Science+Business Media, LLC, part of Springer Nature.

Keywords

Cast iron
HiSiMo
Oxidation
TEM

Access to Document

10.1007/s11085-022-10098-3

Cite this

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title = "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.",

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author = "Wenhui Zhu and Pint, {Bruce A.} and Yang Huo and Larry Godlewski and Bita Ghaffari and Simon Lekakh and Carlos Engler-Pinto and Mei Li",

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AU - Zhu, Wenhui

AU - Pint, Bruce A.

AU - Huo, Yang

AU - Godlewski, Larry

AU - Ghaffari, Bita

AU - Lekakh, Simon

AU - Engler-Pinto, Carlos

AU - Li, Mei

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AB - 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.

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