Title :

Retained austenite-aided cyclic plasticity of the quenched 9Ni steel

Author(s) :

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

Journal title :

International Journal of Fatigue

Volume number :

152

Pages :

106445

Publisher :

Elsevier BV

Publication date :

2021-11

ISSN :

0142-1123

English keyword(s) :

Crack nucleation
Martensite
Cyclic softening
Microstructures - extrusion/intrusions

HAL domain(s) :

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

English abstract : [en]

This study focuses on the low cycle fatigue mechanism of the quenched 9Ni martensitic steel containing retained austenite films at martensite laths. HRTEM and EBSD suggested that extrusions developed along Low Angle Boundaries ...
Show more >This study focuses on the low cycle fatigue mechanism of the quenched 9Ni martensitic steel containing retained austenite films at martensite laths. HRTEM and EBSD suggested that extrusions developed along Low Angle Boundaries or along High Angle Boundaries at low and high strain respectively. Short cracks grew along LAB at low strain while they used any kind of boundary as well as crossed the martensite laths at high strain. Retained austenite allowed a flowing of matter along interfaces by acting as a lubricant. Consequently, the Coffin-Manson relation exhibited a bilinearity with a change in curve slope at Δεt = 1%.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

Submission date :

2021-08-24T07:11:03Z
2021-08-27T06:48:53Z