Title :

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

Author(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]

Conference title :

30th Anniversary International Conference on Metallurgy and Materials

Conference organizers(s) :

Tanger

City :

Prague

Country :

République tchèque

Start date of the conference :

2021-05-26

Publisher :

TANGER Ltd.

Publication date :

2021-09-15

English keyword(s) :

Reversed austenite
retained austenite
martensite
slip marks
fatigue resistance

HAL domain(s) :

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

English abstract : [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. ...
Show more >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.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

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

Submission date :

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