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

SCRIPTA MATERIALIA

卷:173

Article

Shen, Zhao¹  Tweddle, David¹  Lapington, Mark Thomas¹  Jenkins, Benjamin¹  Du, Donghai²  Zhang, Lefu²  Moody, Michael P.¹  Lozano-Perez, Sergio¹ 

[1] Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England

[2] Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

关键词: Stainless steel;    Oxidation;    Stress corrosion cracking;    Transmission electron microscopy;    Atom probe tomography;   

DOI  :  10.1016/j.scriptamat.2019.08.019

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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