Ferritic and martensitic ODS steel resistance upset welding of fuel claddings: Weldability assessment and metallurgical effects

Development and characterization of clad-to-plug resistance upset welds is presented for two oxide dispersion strengthened steels candidates for sodium-cooled fast reactors fuel cladding: 9Cr ferrito-martensitic steel and 14Cr ferritic steel. A comparative approach is adopted regarding these two mat...

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Bibliographic Details
Published in:Journal of nuclear materials 2019-05, Vol.518, p.326-333
Main Authors: Doyen, Olivier, Gloannec, Brendan Le, Deschamps, Alexis, Geuser, Frédéric De, Pouvreau, Cédric, Poulon-Quintin, Angéline
Format: Article
Language:English
Subjects:
Chemical Sciences
Cladding
Dispersion hardening steels
Dynamic recrystallization
EBSD
Ferritic stainless steels
Martensitic stainless steels
Material chemistry
Mechanical properties
Metallurgy
Microstructure
Nano-precipitates
Nuclear fuel cladding
Nuclear fuel elements
Nuclear fuels
ODS steel
Oxide dispersion strengthening
Resistance upset welding
SAXS
Sodium
Steel
Upset welding
Weldability
Welded joints
Welding
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Summary:Development and characterization of clad-to-plug resistance upset welds is presented for two oxide dispersion strengthened steels candidates for sodium-cooled fast reactors fuel cladding: 9Cr ferrito-martensitic steel and 14Cr ferritic steel. A comparative approach is adopted regarding these two materials implying weldability studies and weld mechanical strength tests. A special attention is paid on welding metallurgical effects on the specific microstructure of these materials. Among others, some major grain property modifications by dynamic recrystallization and a slight modification of precipitate sizes and volume fraction are found and discussed.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2019.03.013