Abstract In this work, beneficial effects of dissolved oxygen (DO) on the crack initiation and propagation in borated and lithiated high temperature water were observed, which finally increased the low-cycle fatigue (LCF) life of the 316LN in the water. The 100 ppb DO added in the water also reduced the total amount of absorbed hydrogen. Meanwhile, the oxide film formed was more protective compared with the oxide films formed in oxygen free water. Based on the metallurgical and electrochemical characterizations conducted in the present study, a scheme of the mechanism of the LCF life increase is proposed.

中文翻译：

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100 ppb 溶解氧对 316 L N 奥氏体不锈钢在硼化和锂化高温水中低周疲劳行为的影响及其机制

摘要 在这项工作中，观察了溶解氧（DO）对硼化和锂化高温水中裂纹萌生和扩展的有益影响，最终提高了 316LN 在水中的低周疲劳（LCF）寿命。添加到水中的 100 ppb DO 也减少了吸收的氢气总量。同时，与在无氧水中形成的氧化膜相比，形成的氧化膜更具保护性。基于本研究中进行的冶金和电化学表征，提出了 LCF 寿命增加机制的方案。