Title :

Stability of fatigue cracks at 350 °C in air and in liquid metal in T91 martensitic steel

Author(s) :

Vogt, Jean-Bernard [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Bouquerel, Jeremie [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Carlé, Carla [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Proriol Serre, Ingrid [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]

Journal title :

International Journal of Fatigue

Publication date :

2020

HAL domain(s) :

Chimie/Matériaux

English abstract : [en]

The low cycle fatigue behaviour of a 9Cr1MoNbV martensitic steel has been investigated at 350 °C in air and inlead–bismuth eutectic (LBE) with low and high oxygen content. Total strain controlled tests were performed from ...
Show more >The low cycle fatigue behaviour of a 9Cr1MoNbV martensitic steel has been investigated at 350 °C in air and inlead–bismuth eutectic (LBE) with low and high oxygen content. Total strain controlled tests were performed from Δεt=0.40% to 1.2%. The material exhibited a pronounced cyclic softening in both environments. LBE reduced the fatigue resistance. LBE accelerated the formation of the long crack by promoting the growth of the first short cracks. A clear change in propagation mode was observed. In air, ductile fatigue striations were observed while in LBE a brittle fracture decorated by voluminous and largely spaced striations were visible. From EBSD analysis, it was concluded that in LBE, the long crack advanced quickly by repeated and discontinuous cleavage.Show less >

Language :

Anglais

Audience :

Non spécifiée

Administrative institution(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Métallurgie Physique et Génie des Matériaux
Métallurgie Physique et Génie des Matériaux

Submission date :

2019-10-04T09:21:21Z
2019-10-10T09:12:04Z
2019-10-10T09:13:32Z
2019-10-10T09:22:24Z
2019-11-06T08:12:37Z
2020-02-13T22:24:08Z
2020-10-13T15:30:33Z