Abstract The corrosion of austenite and δ-ferrite phases and the respective phase boundary was investigated in unirradiated and proton-irradiated 308 L stainless steel weld metal in a simulated-PWR environment. The results revealed that the inner oxide thickness was increased by irradiation for austenite but was largely unaffected for δ-ferrite. This behavior was attributed to the fact that irradiation generated numerous structure defects in austenite, but not in δ-ferrite. Following the 3-dpa (displacements per atom) irradiation, enhanced corrosion of δ-ferrite/austenite phase boundary occurred due to the irradiation-induced Cr-depletion. M23C6 carbides along the phase boundary further enhanced corrosion regardless of the irradiation condition.

中文翻译：

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质子辐照 308L 不锈钢焊缝金属在模拟压水堆原水中的相和相界腐蚀

摘要 在模拟压水堆环境中研究了未经辐照和质子辐照的 308 L 不锈钢焊缝金属中奥氏体和 δ-铁素体相的腐蚀以及各自的相界。结果表明，辐照奥氏体会增加内部氧化物厚度，但对 δ-铁素体几乎没有影响。这种行为归因于辐照在奥氏体中产生了许多结构缺陷，但在 δ-铁素体中没有。在 3-dpa（每个原子的位移）辐照后，由于辐照引起的 Cr 耗尽，δ-铁素体/奥氏体相界的腐蚀增强。无论辐照条件如何，沿相界的 M23C6 碳化物都进一步增强了腐蚀。