Title :

Head check resistance of B320 bainitic rail steel grade

Author(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]

Journal title :

Materials Today Communications

Abbreviated title :

Materials Today Communications

Volume number :

31

Pages :

103259

Publisher :

Elsevier BV

Publication date :

2022-06

ISSN :

2352-4928

English keyword(s) :

Carbide-free bainitic steel
Microstructure
Head check defects
TRIP effect

HAL domain(s) :

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

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

Language :

Anglais

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 :

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