Precipitation strengthening of nano-scale ...
Document type :
Article dans une revue scientifique: Article original
Permalink :
Title :
Precipitation strengthening of nano-scale TiC in a duplex low-density steel under near-rapid solidification
Author(s) :
Zhang, Jian-lei [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Shanghai University
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
Unité Matériaux et Transformations - UMR 8207 [UMET]
Shanghai University
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
Journal title :
Journal of Iron and Steel Research International
Abbreviated title :
J. Iron Steel Res. Int.
Publisher :
Springer Science and Business Media LLC
Publication date :
2020-11-07
English keyword(s) :
Precipitation strengthening
Nano-scale TiC precipitate
Low-density steel
Yield strength
Strain hardening
Nano-scale TiC precipitate
Low-density steel
Yield strength
Strain hardening
HAL domain(s) :
Chimie/Matériaux
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
English abstract : [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 ...
Show more >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.Show less >
Show more >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.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Université de Lille
CNRS
INRA
ENSCL
CNRS
INRA
ENSCL
Collections :
Research team(s) :
Métallurgie Physique et Génie des Matériaux
Submission date :
2020-12-15T09:25:23Z
2020-12-15T11:14:50Z
2020-12-15T11:14:50Z