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Analytical Electron Microscopy Study of Interfacial Oxides formed on a Hot-rolled Low-Carbon Steel

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Abstract

The detailed microstructure of oxides at the metal–scale interface of a commercial, hot-rolled steel strip has been examined using analytical electron microscopy. A continuous magnetite layer of about 1–2 μm thick was observed at the interface. The magnetite layer often contained cracks propagating in directions parallel to the interface. In the vicinity of the cracks, the magnetite was oxidized to nanosized maghemite (γ-Fe2O3). We also observed evidence indicating the existence of microchannels which were roughly perpendicular to the interface and might allow oxygen to reach the embedded cracks. Oxide above the magnetite layer was a mixture of α-iron and magnetite produced by wustite decomposition.

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Authors and Affiliations

  1. Steel and Aluminium R&D Department, China Steel Corporation, Kaohsiung, Taiwan ROC

    Liuwen Chang

  2. New Material R&D Department, China Steel Corporation, Kaohsiung, Taiwan, ROC

    Szu Ning Lin

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  1. Liuwen Chang
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  2. Szu Ning Lin
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Correspondence to Liuwen Chang.

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Chang, L., Lin, S.N. Analytical Electron Microscopy Study of Interfacial Oxides formed on a Hot-rolled Low-Carbon Steel. Oxid Met 63, 131–144 (2005). https://doi.org/10.1007/s11085-004-3196-1

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  • DOI: https://doi.org/10.1007/s11085-004-3196-1

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