Titre :

Impact of a heat treatment on the microstructure and the low cycle fatigue properties of a 9Ni steel

Auteur(s) :

Cota Araujo, Mahira-Adna [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Vogt, Jean-Bernard [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Bouquerel, Jeremie [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]

Titre de la manifestation scientifique :

30th Anniversary International Conference on Metallurgy and Materials

Organisateur(s) de la manifestation scientifique :

Tanger

Ville :

Prague

Pays :

République tchèque

Date de début de la manifestation scientifique :

2021-05-26

Éditeur :

TANGER Ltd.

Date de publication :

2021-09-15

Mot(s)-clé(s) en anglais :

Reversed austenite
retained austenite
martensite
slip marks
fatigue resistance

Discipline(s) HAL :

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

Résumé en anglais : [en]

The objective of the present paper is to investigate if the presence and the nature of austenite in 9Ni steel, together with the modification of the matrix induced by heat treatment, change the low cycle fatigue response. ...
Lire la suite >The objective of the present paper is to investigate if the presence and the nature of austenite in 9Ni steel, together with the modification of the matrix induced by heat treatment, change the low cycle fatigue response. The steel was therefore heat-treated so that either a quenched martensitic matrix or a mixture of tempered martensitic with bainitic matrix containing retained or reversed austenite would be obtained, respectively. The experiments showed that while higher stress levels were observed during low cycle fatigue, the quenched microstructure presented a lower fatigue performance under the same applied strain. According to the slip marks pattern, the tempered steel exhibited a higher degree of cyclic deformation accommodation. No obvious effect of austenite in terms of the TRIP effect has been evidenced and the matrix appeared to play a more important role in the fatigue performance. This investigation suggests another possible role of austenite.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Métallurgie Physique et Génie des Matériaux

Date de dépôt :

2021-12-08T20:43:42Z
2021-12-13T10:00:14Z