Abstract The oxide products found on austenitic stainless steels after high temperature exposures in nuclear reactor environments are well documented, but the mechanisms for the oxide formation are still ambiguous. One issue of practical importance is the role of surface deformation on the oxidation response. To address this question, short high-temperature water exposures were conducted on electropolished and ground surfaces of Type 304 stainless steel. Characterization of the developing oxide scales using transmission electron microscopy and atom probe tomography revealed significantly different responses from the two surface finishes. In the absence of sub-surface deformation, the oxide scale grows as an equilibrium phase of uniform composition with accumulation of Cu to the metal/oxide interface. In the presence of significant sub-surface deformation, a non-equilibrium nanostructured oxide scale develops as a result of selective oxidation along fast diffusion paths.

中文翻译：

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表面变形在高温脱气水中 304 SS 氧化响应中的作用

摘要 奥氏体不锈钢在核反应堆环境中高温暴露后发现的氧化物产物有据可查，但氧化物形成的机制仍然不明确。一个具有实际重要性的问题是表面变形对氧化反应的作用。为了解决这个问题，在 304 型不锈钢的电解抛光和地面上进行了短时间的高温水暴露。使用透射电子显微镜和原子探针断层扫描表征发展中的氧化皮揭示了两种表面处理的显着不同的响应。在没有亚表面变形的情况下，氧化皮生长为具有均匀成分的平衡相，Cu 积累到金属/氧化物界面。