ToF-SIMS analyses of brittle crack initiation ...
Document type :
Article dans une revue scientifique
Permalink :
Title :
ToF-SIMS analyses of brittle crack initiation of T91 steel by liquid sodium
Author(s) :
Hamdane, Ouadie [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Vogt, Jean-Bernard [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Proriol Serre, Ingrid [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Nuns, Nicolas [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Vogt, Jean-Bernard [Auteur]

Unité Matériaux et Transformations - UMR 8207 [UMET]
Proriol Serre, Ingrid [Auteur]

Unité Matériaux et Transformations - UMR 8207 [UMET]
Nuns, Nicolas [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Journal title :
Materials Chemistry and Physics
Volume number :
145
Pages :
243-249
Publication date :
2014
English keyword(s) :
Metals
Secondary ion mass spectroscopy (SMS)
Mechanical properties
Embrittlement
Secondary ion mass spectroscopy (SMS)
Mechanical properties
Embrittlement
HAL domain(s) :
Chimie/Matériaux
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
English abstract : [en]
Tempering the martensitic T91 steel at 550 °C instead of 750 °C (recommended heat treatment) makes T91 more sensitive to liquid metal embrittlement. Especially, in liquid sodium, T91 tempered at 550 °C exhibited a brittle ...
Show more >Tempering the martensitic T91 steel at 550 °C instead of 750 °C (recommended heat treatment) makes T91 more sensitive to liquid metal embrittlement. Especially, in liquid sodium, T91 tempered at 550 °C exhibited a brittle fracture while it was ductile in air. Liquid sodium initiated an intergranular crack which then propagated by transgranular mode in the bulk of the specimen. ToF-SIMS analyses were performed on dedicated Small Punch Test specimens in order to distinguish the contribution of the mechanical loading from the sodium environment. Controlled elastic or plastic deformations on pre immersed (503 °C during 169 h) and on as received materials were performed in liquid sodium at 450 °C. Sodium penetration at prior austenitic grains boundaries and at laths boundaries has been pointed out by TOF-SIMS. It is concluded that the sodium penetration requires plastic deformation.Show less >
Show more >Tempering the martensitic T91 steel at 550 °C instead of 750 °C (recommended heat treatment) makes T91 more sensitive to liquid metal embrittlement. Especially, in liquid sodium, T91 tempered at 550 °C exhibited a brittle fracture while it was ductile in air. Liquid sodium initiated an intergranular crack which then propagated by transgranular mode in the bulk of the specimen. ToF-SIMS analyses were performed on dedicated Small Punch Test specimens in order to distinguish the contribution of the mechanical loading from the sodium environment. Controlled elastic or plastic deformations on pre immersed (503 °C during 169 h) and on as received materials were performed in liquid sodium at 450 °C. Sodium penetration at prior austenitic grains boundaries and at laths boundaries has been pointed out by TOF-SIMS. It is concluded that the sodium penetration requires plastic deformation.Show less >
Language :
Anglais
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Université de Lille
ENSCL
CNRS
Centrale Lille
INRA
Univ. Artois
ENSCL
CNRS
Centrale Lille
INRA
Univ. Artois
Collections :
Research team(s) :
Métallurgie Physique et Génie des Matériaux
Submission date :
2019-05-16T16:45:10Z
2020-12-07T08:22:53Z
2020-12-07T08:23:49Z
2020-12-07T08:22:53Z
2020-12-07T08:23:49Z