Titre :

Precipitation strengthening of nano-scale TiC in a duplex low-density steel under near-rapid solidification

Auteur(s) :

Zhang, Jian-lei [Auteur]
Shanghai University
Unité Matériaux et Transformations - UMR 8207 [UMET]
Hu, Cong-hui [Auteur]
Shanghai University
Liu, Yu-xiang [Auteur]
Shanghai University
Yang, Yang [Auteur]
Shanghai University
Ji, Gang [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Song, Chang-jiang [Auteur]
Shanghai University
Zhai, Qi-jie [Auteur]
Shanghai University

Titre de la revue :

Journal of Iron and Steel Research International

Nom court de la revue :

J. Iron Steel Res. Int.

Éditeur :

Springer Science and Business Media LLC

Date de publication :

2020-11-07

Mot(s)-clé(s) en anglais :

Precipitation strengthening
Nano-scale TiC precipitate
Low-density steel
Yield strength
Strain hardening

Discipline(s) HAL :

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

Résumé en anglais : [en]

Precipitation strengthening of nano-scale TiC is a promising method to improve mechanical properties of Fe–16Mn–9Al–0.8C (wt.%) low-density steel. This work attempted to introduce nano-scale TiC precipitates by adding 1 ...
Lire la suite >Precipitation strengthening of nano-scale TiC is a promising method to improve mechanical properties of Fe–16Mn–9Al–0.8C (wt.%) low-density steel. This work attempted to introduce nano-scale TiC precipitates by adding 1 wt.% Ti element. The experimental results show that these precipitates with the total fraction of about 2 vol.% were formed and no coarse precipitates were observed despite the high Ti addition. It was interesting that the polygonal and needle-shaped TiC precipitates were observed in γ-austenite and δ-ferrite, respectively. Ti addition also decreased the volume fraction of γ-austenite significantly. Correspondingly, the yield strength was increased, but the elongation was significantly decreased due to the significant decrease of γ-austenite. Comparing with the Ti-free steel, the formation of TiC precipitates was the main reason for the increase in yield strength of Ti-bearing steel, and TiC precipitates also led to a higher strain hardening index at the first deformation stage. TiC precipitates promoted the Orowan strengthening, resulting in a higher strain hardening capability than Ti-free steel reinforced by shearable κ-carbide.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 :

2020-12-15T09:25:23Z
2020-12-15T11:14:50Z