Microstructure refinement of dual-phase steels with 3.5wt% Mn: influence on plastic and fracture behavior

Q. Lai; O. Bouaziz; M. Gouné; A. Perlade; Y. Bréchet; T. Pardoen

doi:10.1016/j.msea.2015.04.044

Microstructure refinement of dual-phase steels with 3.5wt% Mn: influence on plastic and fracture behavior

Q. Lai, O. Bouaziz, M. Gouné, A. Perlade, Y. Bréchet, T. Pardoen

Research output: Contribution to journal › Article › Research › peer-review

25 Citations (Scopus)

Abstract

The plastic and fracture behavior of ultrafine-grained dual-phase (UFG-DP) steels (Fe-0.1. wt%C-3.5. wt%Mn) were analysed from the comparison with the coarser grained DP microstructures taken as references. The UFG-DP steel exhibits a superior balance between strength, uniform elongation and true fracture strain. The higher mechanical performance is explained by both a size effect and a relatively high Mn content in austenite which lead to a Transformation-Induced-Plasticity effect. Furthermore, the analysis shows that microstructure refinement significantly retards damage accumulation and modifies the dominant damage mechanism and fracture behavior. The analysis confirms that the present grade of ultrafine-grained DP steels is a serious candidate for automotive applications.

Original language	English
Pages (from-to)	78-89
Number of pages	12
Journal	Materials Science and Engineering A
Volume	638
DOIs	https://doi.org/10.1016/j.msea.2015.04.044
Publication status	Published - 25 Jun 2015
Externally published	Yes

Keywords

Damage
Dual-phase steel
Fracture
Plasticity
Ultrafine-grained metals

Access to Document

10.1016/j.msea.2015.04.044

Cite this

@article{3ffbb274ce8b44dbae7b579512e6b354,

title = "Microstructure refinement of dual-phase steels with 3.5wt% Mn: influence on plastic and fracture behavior",

abstract = "The plastic and fracture behavior of ultrafine-grained dual-phase (UFG-DP) steels (Fe-0.1. wt%C-3.5. wt%Mn) were analysed from the comparison with the coarser grained DP microstructures taken as references. The UFG-DP steel exhibits a superior balance between strength, uniform elongation and true fracture strain. The higher mechanical performance is explained by both a size effect and a relatively high Mn content in austenite which lead to a Transformation-Induced-Plasticity effect. Furthermore, the analysis shows that microstructure refinement significantly retards damage accumulation and modifies the dominant damage mechanism and fracture behavior. The analysis confirms that the present grade of ultrafine-grained DP steels is a serious candidate for automotive applications.",

keywords = "Damage, Dual-phase steel, Fracture, Plasticity, Ultrafine-grained metals",

author = "Q. Lai and O. Bouaziz and M. Goun{\'e} and A. Perlade and Y. Br{\'e}chet and T. Pardoen",

year = "2015",

month = jun,

day = "25",

doi = "10.1016/j.msea.2015.04.044",

language = "English",

volume = "638",

pages = "78--89",

journal = "Materials Science and Engineering A",

issn = "0921-5093",

publisher = "Elsevier",

}

TY - JOUR

T1 - Microstructure refinement of dual-phase steels with 3.5wt% Mn

T2 - influence on plastic and fracture behavior

AU - Lai, Q.

AU - Bouaziz, O.

AU - Gouné, M.

AU - Perlade, A.

AU - Bréchet, Y.

AU - Pardoen, T.

PY - 2015/6/25

Y1 - 2015/6/25

N2 - The plastic and fracture behavior of ultrafine-grained dual-phase (UFG-DP) steels (Fe-0.1. wt%C-3.5. wt%Mn) were analysed from the comparison with the coarser grained DP microstructures taken as references. The UFG-DP steel exhibits a superior balance between strength, uniform elongation and true fracture strain. The higher mechanical performance is explained by both a size effect and a relatively high Mn content in austenite which lead to a Transformation-Induced-Plasticity effect. Furthermore, the analysis shows that microstructure refinement significantly retards damage accumulation and modifies the dominant damage mechanism and fracture behavior. The analysis confirms that the present grade of ultrafine-grained DP steels is a serious candidate for automotive applications.

AB - The plastic and fracture behavior of ultrafine-grained dual-phase (UFG-DP) steels (Fe-0.1. wt%C-3.5. wt%Mn) were analysed from the comparison with the coarser grained DP microstructures taken as references. The UFG-DP steel exhibits a superior balance between strength, uniform elongation and true fracture strain. The higher mechanical performance is explained by both a size effect and a relatively high Mn content in austenite which lead to a Transformation-Induced-Plasticity effect. Furthermore, the analysis shows that microstructure refinement significantly retards damage accumulation and modifies the dominant damage mechanism and fracture behavior. The analysis confirms that the present grade of ultrafine-grained DP steels is a serious candidate for automotive applications.

KW - Damage

KW - Dual-phase steel

KW - Fracture

KW - Plasticity

KW - Ultrafine-grained metals

UR - http://www.scopus.com/inward/record.url?scp=84928889361&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2015.04.044

DO - 10.1016/j.msea.2015.04.044

M3 - Article

AN - SCOPUS:84928889361

SN - 0921-5093

VL - 638

SP - 78

EP - 89

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

ER -

Microstructure refinement of dual-phase steels with 3.5wt% Mn: influence on plastic and fracture behavior

Abstract

Keywords

Access to Document

Other files and links

Cite this