Titre :

Effect of Interlamellar Spacing on the Low Cycle Fatigue Behavior of a Fully Pearlitic Steel

Auteur(s) :

Ávila de Oliveira Silva, Laís [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Adinolfi Colpaert Sartori, Guilherme [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Polytechnic School of the University of São Paulo (Brazil)
Bondarchuk, Diana [Auteur]
National Polytechnic University of Lviv [LPNU]
Oliveira Anício Costa, Isadora Maria [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Mesplont, Christophe [Auteur]
Vogt, Jean-Bernard [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207

Titre de la revue :

Metallography, Microstructure, and Analysis

Nom court de la revue :

Metallogr. Microstruct. Anal.

Éditeur :

Springer Nature

Date de publication :

2021-09-13

ISSN :

2192-9262

Mot(s)-clé(s) en anglais :

Cementite lamella
Cyclic accommodation
Crack initiation
Fracture

Discipline(s) HAL :

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

Résumé en anglais : [en]

The present study aims at investigating the low cycle fatigue behavior of two fully AISI 1080 pearlitic steels which differed in their interlamellar spacing (72 ± 15 and 143 ± 32 nm). Low cycle fatigue tests were performed ...
Lire la suite >The present study aims at investigating the low cycle fatigue behavior of two fully AISI 1080 pearlitic steels which differed in their interlamellar spacing (72 ± 15 and 143 ± 32 nm). Low cycle fatigue tests were performed under positive strain control at different total strain variations (0.6% ≤ Δεt ≤ 1.6%). It is shown that both alloys presented an asymmetric stress response and a cyclic softening during the first fatigue life fractions. The tension stress peaks were higher for the fine pearlitic steel than for the coarse one but the compression stress peaks were less different. The extrusion–intrusion pairs formed at the external surface were more developed for the coarse pearlitic steel. The results suggest that the critical short crack size to propagate in the bulk is much smaller in the fine pearlitic steel which explains the shorter fatigue lives. For both steels, the entire fracture surface comprised a fatigue propagation zone, a final fully brittle zone separated by a narrow ductile transition zone.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 :

2021-09-16T19:47:49Z
2021-09-21T08:09:49Z