CHARACTERISTICS OF OXIDES ON A PRE-STRESSED T91 STEEL EXPOSED TO LIQUID LEAD-BISMUTH EUTECTIC

1 DI GABRIELE Fosca
Co-authors:
1 LORINCIK Jan 1 HALODOVA Patricie 1 DUCHON Jan 1 HOJNA Anna
Institution:
1 Centrum Vyzkumu Rez, CVR, Husinec-Rez, Czech Republic
Conference:
26th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 24th - 26th 2017
Proceedings:
Proceedings 26th International Conference on Metallurgy and Materials
Pages:
688-692
ISBN:
978-80-87294-79-6
ISSN:
2694-9296
Published:
9th January 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
13 views / 5 downloads
Abstract

Compatibility of structural materials with a coolant, in conditions relevant to power plant operation, is a field of research of primary importance to nuclear safety. The current work describes the behaviour of T91 steels, under such conditions. Three-point-bend specimens were pre-stressed up to yield strength and subsequently exposed to lead-bismuth eutectic (LBE) in static conditions for 2000 hours. The aim was to identify the susceptibility to crack initiation in the selected experimental conditions. Post-test examination by means of SEM equipped with EDX demonstrated the formation of oxide scales without any trace of crack initiation. The oxide was characterised by a two-layer structure. By FIB cutting, lamellas were produced and analysed in HRTEM. EELS technique was used for elemental evaluation of the oxides. Characteristics of the oxide and its interface with the steel were thoroughly characterised.

Keywords: ferritic-martensitic steel, lead-bismuth eutectic, oxidation, FIB lamellas
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