Titre :

Head check resistance of B320 bainitic rail steel grade

Auteur(s) :

Lesage, Thibault [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Avettand-Fènoël, Marie-NoËlle [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Unité Matériaux et Transformations - UMR 8207 [UMET]
Balloy, David [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Unité Matériaux et Transformations - UMR 8207 [UMET]
Assaf, S. [Auteur]
Cristofari, F. [Auteur]
Secordel, P. [Auteur]

Titre de la revue :

Materials Today Communications

Nom court de la revue :

Materials Today Communications

Numéro :

31

Pagination :

103259

Éditeur :

Elsevier BV

Date de publication :

2022-06

ISSN :

2352-4928

Mot(s)-clé(s) en anglais :

Carbide-free bainitic steel
Microstructure
Head check defects
TRIP effect

Discipline(s) HAL :

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

Résumé en anglais : [en]

This work focuses on the degradation mechanisms of a B320 carbide-free bainitic steel grade rail and of its weld after laboratory tests. The microstructure of the tested rails is investigated, focusing mainly on retained ...
Lire la suite >This work focuses on the degradation mechanisms of a B320 carbide-free bainitic steel grade rail and of its weld after laboratory tests. The microstructure of the tested rails is investigated, focusing mainly on retained austenite. The Head Check resistance of B320 grade base material is high, notably due to the TRansformation Induced Plasticity (TRIP) effect, inducing a reduction in crack propagation speed. Inside the Heat Affected Zone, a few Head Check defects have been detected and are attributed to a lower retained austenite content coming with a higher Martensite-Austenite Compound content prior to rail testing. In this zone, the transformation process from austenite to martensite following TRIP effect is less pronounced. A novel degradation mechanism is proposed considering the phases contribution in the deformation process of B320 carbide free steel grade.Lire moins >

Langue :

Anglais

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 :

2022-02-22T09:15:34Z
2022-02-24T15:08:28Z