Microstructural study of 15-15 Ti-Stabilized Stainless Steel For SFR Fuel Cladding

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Microstructural study of 15-15 Ti-Stabilized Stainless Steel For SFR Fuel Cladding

Popis výsledku v původním jazyce

Titanium stabilized, 15-15Ti stainless steel cladding is the primary choice for fuel cladding in current fast spectrum reactors like sodium cooled fast reactor. The choice of this cladding material grade is due to their superior irradiation swelling resistance and enhanced thermal creep strength in comparison to other austenitic steels. This paper presents, microstructural evaluation of a recently produced nuclear grade DIN 1.4970 cladding material cold worked at 24 % and 46 %. The microstructure was characterized by Scanning Electron Microscopy, Transmission Electron Microscopy. Chemical analysis was performed by EDX and texture was determined by EBSD. Hardness was evaluated by nano-indentation method. In both the cold worked materials, typical microscopic features of Ti-(C, N) precipitates, deformation twins and slip bands were revealed. Precipitates were mostly in the range of sub-micrometre to few microns order. Elongated stringer-like TiC precipitates in the tube drawing direction were also revealed. Hardness tests results will be presented showing correlation between local microstructure and mechanical properties.

Název v anglickém jazyce

Microstructural study of 15-15 Ti-Stabilized Stainless Steel For SFR Fuel Cladding

Popis výsledku anglicky

Titanium stabilized, 15-15Ti stainless steel cladding is the primary choice for fuel cladding in current fast spectrum reactors like sodium cooled fast reactor. The choice of this cladding material grade is due to their superior irradiation swelling resistance and enhanced thermal creep strength in comparison to other austenitic steels. This paper presents, microstructural evaluation of a recently produced nuclear grade DIN 1.4970 cladding material cold worked at 24 % and 46 %. The microstructure was characterized by Scanning Electron Microscopy, Transmission Electron Microscopy. Chemical analysis was performed by EDX and texture was determined by EBSD. Hardness was evaluated by nano-indentation method. In both the cold worked materials, typical microscopic features of Ti-(C, N) precipitates, deformation twins and slip bands were revealed. Precipitates were mostly in the range of sub-micrometre to few microns order. Elongated stringer-like TiC precipitates in the tube drawing direction were also revealed. Hardness tests results will be presented showing correlation between local microstructure and mechanical properties.

Druh

D - Stať ve sborníku

CEP obor

JF - Jaderná energetika

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Zvyšování životnosti komponent energetických zařízení v elektrárnách

ISBN

978-80-261-0644-9

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

1-6

Název nakladatele

VZÚ Plzeň

Místo vydání

Plzeň

Místo konání akce

Srní

Datum konání akce

18. 10. 2016

Typ akce podle státní příslušnosti

CST - Celostátní akce

Kód UT WoS článku

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