Titre :

Dynamic recrystallization's role in strength-ductility trade-off in polycrystalline Fe–Cr–Ni stainless steels produced by laser powder bed fusion

Auteur(s) :

Heidarzadeh, Akbar [Auteur]
Azarbaijan Shahid Madani University
Zavašnik, Janez [Auteur]
Jozef Stefan Institute [Ljubljana] [IJS]
Shabadi, Rajashekhara [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Mousavian, Reza Taherzadeh [Auteur]
Dublin City University [Dublin] [DCU]

Titre de la revue :

Materials Science and Engineering: A

Numéro :

814

Pagination :

141214

Éditeur :

Elsevier

Date de publication :

2021-05-13

ISSN :

0921-5093

Discipline(s) HAL :

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

Résumé en anglais : [en]

The deformation mechanisms and reasons for excellent ductility in additively manufactured Fe–Cr–Ni stainless steels by laser powder bed fusion (L-PBF) were disclosed by an interrupted tensile test at room temperature, ...
Lire la suite >The deformation mechanisms and reasons for excellent ductility in additively manufactured Fe–Cr–Ni stainless steels by laser powder bed fusion (L-PBF) were disclosed by an interrupted tensile test at room temperature, electron backscattered diffraction, and transmission electron microscopy. The results showed dislocation (DL) slip starts at low strain values, resulting in a rearrangement of DLs and reorientation of low angle grain boundaries along with shear bands. At higher strain values, deformation twins intersect with other twins, DLs, stacking faults, and grain boundaries. In addition to planar slip and twining-induced plasticity (TWIP), dynamic recrystallization (DRX) was observed during deformation due to the formation of a high density of DLs during L-PBF. Different deformation and DRX mechanisms are disclosed in detail, including their origin, sequences, and interplay. The results presented in this paper opens a new operation window for the other types of TWIP steels, such as medium and high Mn steels to be manufactured by the L-PBF to maximize their energy impact.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Projet Européen :

Enabling Science and Technology through European Electron Microscopy

Établissement(s) :

Université de Lille
CNRS
INRAE
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Métallurgie Physique et Génie des Matériaux

Date de dépôt :

2024-01-15T14:35:00Z
2024-01-31T16:03:30Z