Electrochemical and microstructural characterization of an austenitic stainless steel irradiated by heavy ions at 515°C
Electrochemical and microstructural characterization of an austenitic stainless steel irradiated by heavy ions at 515°C
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515°C 重离子辐照奥氏体不锈钢的电化学和微观结构表征
DOI：
10.1016/0022-3115(92)90549-z
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发表时间：
1992
影响因子：
3.1
通讯作者：
T. Kondo
中科院分区：
文献类型：
--
作者：
G. Bell;T. Inazumi;E. Kenik;T. Kondo
固溶退火重离子辐照奥氏体不锈钢的电化学和微观结构行为。在515°C下，在1.10和30位移/原子（dpa）的剂量下研究了命名为LS 1A的化合物。电化学性能的变化，由于辐射引起的隔离在薄的辐射影响层的材料进行了检测的电化学动电位再活化（EPR）技术，使用TEM磁盘标本。在所有剂量下，Flade电位和再活化电荷均大于热老化对照样本的测量值。试验后，在所有试样上观察到与EPR试验中子辐照奥氏体不锈钢相似的晶粒面蚀刻。重复的重离子辐照试样也进行了高分辨率分析电子显微镜（AEM）检查。1dpa试样仅显示出高密度的小断层位错（~ 10 nm），未检测到晶界沉淀或晶界偏析。AEM证实铬和钼耗尽晶界EPR测量的10和30 dpa标本。
The electrochemical and microstructural behavior of a solution-annealed, heavy-ion-irradiated, austenitic stainless steel. designated LS1A, have been investigated at 515°C after doses of 1.10 and 30 displacements per atom (dpa). Changes in electrochemical properties due to radiation-induced segregation in thin radiation-affected layers of the material were detected by the electrochemical potentiokinetic reactivation (EPR) technique using TEM disk specimens. At all doses, the Flade potential and reactivation charge were greater than those measured for thermally-aged control specimens. Grain face etching, similar to that found on EPR-tested neutron irradiated austenitic stainless steels, was observed on all specimens after testing. Duplicate heavy ion irradiated specimens were also examined by high resolution analytical electron microscopy (AEM). The 1 dpa specimen showed only a high density of small faulted dislocations (~ 10 nm), and no grain boundary precipitation or grain boundary segregation was detected. AEM confirmed chromium and molybdenum depletion at grain boundaries as measured by EPR for the 10 and 30 dpa specimens.