Observation of internal oxidation in a 20% cold-worked Fe-17Cr-12Ni stainless steel through high-resolution characterization

It is often assumed that internal oxidation cannot occur at temperatures below 400 °C. However, in the present work, internal oxidation was observed in a 20% cold-worked Fe-17Cr-12Ni stainless steel (SS) after exposure to simulated primary water of a pressurized water reactor at 340 °C and not in a...

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Bibliographic Details
Published in:Scripta materialia 2019-12, Vol.173, p.144-148
Main Authors: Shen, Zhao, Tweddle, David, Lapington, Mark Thomas, Jenkins, Benjamin, Du, Donghai, Zhang, Lefu, Moody, Michael P., Lozano-Perez, Sergio
Format: Article
Language:English
Subjects:
Atom probe tomography
Oxidation
Stainless steel
Stress corrosion cracking
Transmission electron microscopy
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Summary:It is often assumed that internal oxidation cannot occur at temperatures below 400 °C. However, in the present work, internal oxidation was observed in a 20% cold-worked Fe-17Cr-12Ni stainless steel (SS) after exposure to simulated primary water of a pressurized water reactor at 340 °C and not in a similarly tested sample without prior cold-work. The formation of discrete Cr-oxide precipitates and the role of cold-work are discussed. The internal oxidation model is also proposed as a plausible stress corrosion cracking mechanism of Fe-17Cr-12Ni SS at that temperature. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2019.08.019