Effect of irradiation temperature on microstructure of ferritic-martensitic ODS steel

The EUROFER-ODS alloy with 0.5% Y2O3 was neutron irradiated with doses up to 16.2 dpa at 250 °C, 350 °C and 450 °C. The radiation induced changes in the microstructure (e.g. dislocation loops and voids) were investigated using transmission electron microscopy (TEM). The number density of radiation i...

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Bibliographic Details
Published in:Journal of nuclear materials 2017-09, Vol.493, p.426-435
Main Authors: Klimenkov, M., Lindau, R., Jäntsch, U., Möslang, A.
Format: Article
Language:English
Subjects:
Burgers vector
Density
Disease transmission
Dislocation
Dislocation density
Dislocation loops
Dispersion hardening alloys
Dispersion hardening steels
Effects
Electron microscopy
EUROFER-ODS
Ferritic stainless steels
Ferrtitc-martensitic ODS steel
Irradiation
Martensitic stainless steels
Microstructure
Neutron irradiation
Neutrons
Particle physics
Particle size distribution
Radiation
Radiation damage
Radiation effects
Size distribution
Steel
Temperature
Transmission electron microscopy
WBDF
Yttrium oxide
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Summary:The EUROFER-ODS alloy with 0.5% Y2O3 was neutron irradiated with doses up to 16.2 dpa at 250 °C, 350 °C and 450 °C. The radiation induced changes in the microstructure (e.g. dislocation loops and voids) were investigated using transmission electron microscopy (TEM). The number density of radiation induced defects was found to be significantly lower than in EUROFER 97 irradiated at the same conditions. It was found that the appearance and extent of radiation damage strongly depend not only on the irradiation temperature but also on the local number density and size distribution of ODS particles. The higher number density of dislocation loops and voids was found in the local areas with low number density of ODS particles. The interstitial loops with Burgers vector of both ½ and types were detected by imaging using different diffraction conditions.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2017.06.024