Titre :

Effect of hydrogen and thermal aging on plastic deformation of a duplex stainless steel

Auteur(s) :

Bchara, Rana [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Proriol Serre, Ingrid [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Vogt, Jean-Bernard [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]

Titre de la manifestation scientifique :

31st International Conference on Metallurgy and Materials

Ville :

Brno

Pays :

République tchèque

Date de début de la manifestation scientifique :

2022-05-18

Date de publication :

2022-06-30

Mot(s)-clé(s) en anglais :

AFM
Plastic deformation
Stainless steel
Fatigue slip marks

Discipline(s) HAL :

Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Chimie/Matériaux

Résumé en anglais : [en]

In this paper, the effects of hydrogen charging and aging treatment on the cyclic plasticity of a S32304 lean duplex steel were investigated. The surface modifications were analyzed using atomic force microscopy and scanning ...
Lire la suite >In this paper, the effects of hydrogen charging and aging treatment on the cyclic plasticity of a S32304 lean duplex steel were investigated. The surface modifications were analyzed using atomic force microscopy and scanning electron microscopy. The slip morphologies of annealed, hydrogenated or thermally aged specimens were compared after cyclic loading at p= 0.07%. Significant changes were detected for austenite charged with hydrogen and for ferrite thermally aged. The results indicated a planar slip mode with a secondary slip for hydrogenated austenite. The height and the spacing between the slip marks of austenite (SBH and SBS) decreased from [30-5] nm to [8-2] nm and from [3-0.7] m to [1-0.2] m respectively with hydrogen addition. The morphology and the mean value of SBH and SBS of ferrite slip lines remained the same after 5 h of hydrogen charging. However, the increase of hydrogen charging duration created micro-cracks inside the slip bands of ferrite and decreased the value of their SBH and SBS. The thermally aged steel developed straight slip bands inside the ferrite after cyclic loading while they were curvilinear in the annealed material. The effect of the -phase spinodal decomposition was pointed out even for a short aging duration.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
INRAE
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Métallurgie Physique et Génie des Matériaux

Date de dépôt :

2022-11-08T21:38:37Z
2022-11-09T13:36:52Z