Title :

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

Author(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]

Journal title :

Materials Science and Engineering: A

Volume number :

814

Pages :

141214

Publisher :

Elsevier

Publication date :

2021-05-13

ISSN :

0921-5093

HAL domain(s) :

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

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

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

European Project :

Enabling Science and Technology through European Electron Microscopy

Administrative institution(s) :

Université de Lille
CNRS
INRAE
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Métallurgie Physique et Génie des Matériaux

Submission date :

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