Atomic scale investigation of radiation-induced segregation in austenitic stainless steels
Atomic scale investigation of radiation-induced segregation in austenitic stainless steels
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DOI：
10.1016/j.jnucmat.2010.08.043
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发表时间：
2010-11
影响因子：
3.1
通讯作者：
A. Etienne;B. Radiguet;N. Cunningham;G. Odette;P. Pareige
中科院分区：
文献类型：
--
作者：
A. Etienne;B. Radiguet;N. Cunningham;G. Odette;P. Pareige
用原子探针层析技术研究了冷加工316奥氏体不锈钢在10 MeV Fe ~（5+）离子辐照下产生的沉淀和偏析。Ni和Si的富集和Cr的亏损被观察到在大致的球形和环形的集群，被认为是由于溶质富集和亏损的位错环。在网状位错处也观察到溶质偏析。这些观察结果与辐射引起的分离现象是一致的。在近原子尺度上研究了辐照引起的晶界偏析。将这些观察结果与文献结果进行比较，发现分离溶质的峰浓度大小存在差异。
Radiation-induced precipitation and segregation in a cold-worked 316 austenitic stainless steel irradiated with 10MeV Fe5+ions were characterized by atom probe tomography. Ni and Si enrichment and Cr depletion were observed in roughly spherical and torus-shaped clusters, believed to be due to solute enrichment and depletion at dislocation loops. Solute segregation was also observed at network dislocations. These observations are consistent with the phenomenon of radiation-induced segregation. Radiation-induced segregation at grain boundaries was also studied at the near atomic scale. Comparison of these observations with results from the literature shows a difference in the magnitude of the peak concentration of segregated solutes.