Journal
SCRIPTA MATERIALIA
Volume 173, Issue -, Pages 144-148Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2019.08.019
Keywords
Stainless steel; Oxidation; Stress corrosion cracking; Transmission electron microscopy; Atom probe tomography
Categories
Funding
- National Natural Science Foundation of China [51871153]
- EPSRC [EP/K040375/1, EP/N010868/1, EP/R009392/1]
- China Scholarship Council (CSC)
- EPSRC [EP/K040375/1, EP/R009392/1, EP/N010868/1] Funding Source: UKRI
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It is often assumed that internal oxidation cannot occur at temperatures below 400 degrees 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 degrees 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. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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