Titre :

Probing the effect of intragranular premature κ-carbide on incipient plasticity behavior in austenite-based Fe-Mn-Al-(Cr)-C steels

Auteur(s) :

Zhang, Jianlei [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Shanghai University
Liu, Yuxiang [Auteur]
Shanghai University
Hu, Conghui [Auteur]
Shanghai University
Addad, Ahmed [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Montagne, Alex [Auteur]
Mechanics surfaces and materials processing [MSMP]
Ji, Gang [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Song, Changjiang [Auteur]
Shanghai University
Zhai, Qijie [Auteur]
Shanghai University
Zhang, Jianlei [Auteur]

Titre de la revue :

Materials Research Letters

Nom court de la revue :

Materials Research Letters

Numéro :

10

Pagination :

141-148

Éditeur :

Informa UK Limited

Date de publication :

2022-01-31

ISSN :

2166-3831

Mot(s)-clé(s) en anglais :

Fe-Mn-Al-C low-density steel
premature κ-carbide
dislocation nucleation
nanoindentation
charge transfer

Discipline(s) HAL :

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

Résumé en anglais : [en]

The effect of nanoscale intragranular premature κ-carbide precipitates, having an ordered structure but without chemical partitioning, on the incipient plasticity behavior of austenite in Fe-Mn-Al-(Cr)-C low-density steels ...
Lire la suite >The effect of nanoscale intragranular premature κ-carbide precipitates, having an ordered structure but without chemical partitioning, on the incipient plasticity behavior of austenite in Fe-Mn-Al-(Cr)-C low-density steels was investigated by nanoindentation. We found that the incipient plasticity was dominated by a heterogeneous dislocation nucleation mechanism via atom-vacancy exchange. Although the content of κ-carbide decreased with Cr addition, its negligible effect on incipient plasticity strength was witnessed by the slightly increased shear stress for dislocation nucleation. Comparatively, the increased interstitial C atoms with Cr content in austenite enhanced lattice cohesions which impeded the nucleation events by increasing the requisite shear stress.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 :

2022-01-31T11:10:43Z
2022-01-31T11:33:45Z