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Atomistic analysis of radiation-induced segregation in ion-irradiated stainless steel 316

Title
Atomistic analysis of radiation-induced segregation in ion-irradiated stainless steel 316
Authors
Lee, GG[Lee, G. -G.]Jin, HH[Jin, H. -H.]Chang, K[Chang, K.]Lee, BH[Lee, B. H.]Kwon, J[Kwon, J.]
DGIST Authors
Lee, BH[Lee, B. H.]
Issue Date
2015
Citation
Archives of Metallurgy and Materials, 60(2), 1179-1184
Type
Article
Article Type
Article
Keywords
Atom-Probe TomographyAtom Probe Tomography (APT)Atomistic AnalysisAtomsDefectsInterlocking SignalsIon BombardmentIon IrradiationIonsIrradiated Stainless SteelsIrradiationIrradiation Assisted Stress Corrosion CrackingIrradiation DefectIrradiation DefectsModerate TemperatureNuclear Power PlantsPoint DefectsPotential ProblemsProbesRadiationRadiation-Induced SegregationRadiation-Induced Segregation (RIS)Segregation (Metallography)Stainless SteelStress Corrosion Cracking
ISSN
1733-3490
Abstract
Stainless steel (SS) is a well-known material for the internal parts of nuclear power plants. It is known that these alloys exhibit radiation-induced segregation (RIS) at point defect sinks at moderate temperature, while in service. The RIS behavior of SS can be a potential problem by increasing the susceptibility to irradiation-assisted stress corrosion cracking. In this work, the RIS behavior of solute atoms at sinks in SS 316 irradiated with Fe4+ ions were characterized by atom probe tomography (APT). There were torus-shaped defects along with a depletion of Cr and enrichment of Ni and Si. These clusters are believed to be dislocation loops resulting from irradiation. The segregation of solutes was also observed for various defect shapes. These observations are consistent with other APT results from the literature. The composition of the clusters was analyzed quantitatively almost at the atomic scale. Despite the limitations of the experiments, the APT analysis was well suited for discovering the structure of irradiation defects and performing a quantitative analysis of RIS in irradiated specimens.
URI
http://hdl.handle.net/20.500.11750/2621
DOI
10.1515/amm-2015-0093
Publisher
Committee of Metallurgy
Related Researcher
Files:
There are no files associated with this item.
Collection:
Center for Core Research Facilities1. Journal Articles


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