Mechanical behavior in liquid lead-bismuth eutectic of some Alumina-Forming Austenitic (AFA) steels:effect of composition and aging at 650°C - Université de Lille Accéder directement au contenu
Communication Dans Un Congrès Année : 2021

Mechanical behavior in liquid lead-bismuth eutectic of some Alumina-Forming Austenitic (AFA) steels:effect of composition and aging at 650°C

Résumé

for the durability and the safety of the lead cooled Fast Reactor and accelerated driven systems.Moreover, it is well-known that the presence of a liquid metal may compromise the good performances of a metallic alloy due to liquid metal corrosion or liquid metal assisted mechanical damage.To increase corrosion resistance of some steels in contact with lead-bismuth eutectic (LBE), different materials were selected, developed and then tested in contact LBE. One of the solutions is the presence of aluminium at the surface of the materials in order to allow the formation of an oxide layer, permanently and whatever the content of oxygen present in the liquid metal. This oxide layer aims at avoiding the contact between the steel and the liquid metal, limiting all steel / liquid metal interactions and therefore reducing the corrosion phenomena. The selected materials are Alumina-Forming Austenitic (AFA) steels. But, though tough and ductile steels are selected, they may become brittle when stressed in liquid metal exhibiting thus the Liquid Metal Embrittlement (LME).The aim of the present work is the study of LME sensitivity by LBE of two AFA steels. Aging at650 ℃ for 4 durations were considered between 1008 and 5044 hours.Small Punch Tests in air and in liquid LBE were performed at 2 different temperatures. After tests, cracking and fracture surfaces were analysed by scanning electron microscopy. The effect of the presence of liquid metal LBE will be discussed according to the microstructure of the steels as well as to the temperature (350℃ and 450℃).The results presented in this paper is a part of the contribution obtained in our lab, for the GEMMA (Generation IV Materials Maturity) H2020 program.
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Dates et versions

hal-03400835 , version 1 (25-10-2021)

Identifiants

  • HAL Id : hal-03400835 , version 1

Citer

Ingrid Proriol Serre, Ines Ponsot, Jean-Bernard Vogt. Mechanical behavior in liquid lead-bismuth eutectic of some Alumina-Forming Austenitic (AFA) steels:effect of composition and aging at 650°C. EUROMAT 2021, ASMET, Sep 2021, En visio, Austria. ⟨hal-03400835⟩
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