Achievement of high yield strength and strain hardening rate by forming fine ferrite and dislocation substructures in duplex lightweight steel

Hyejin Song; Jisung Yoo; Seok Su Sohn; Minseo Koo; Sunghak Lee

doi:10.1016/j.msea.2017.08.030

Achievement of high yield strength and strain hardening rate by forming fine ferrite and dislocation substructures in duplex lightweight steel

Hyejin Song, Jisung Yoo, Seok Su Sohn, Minseo Koo, Sunghak Lee

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

23 Citations (Scopus)

Abstract

Lightweight steels containing a considerable content of Al show high specific strength and ductility, but there are some drawbacks such as low yield strength and stringer-type bands formed along the rolling direction. Here we design new duplex lightweight steel in order to complement the drawbacks, and achieve ultra-high yield strength (865 MPa), good ductility (41%). Submicron ferrite mainly affects high yield-to-tensile ratio, and high strain hardening is attributed to Lomer-Cottrell lock and planar slip, and cell structure by further deformation in austenite. These results are expected to provide a desirable possibility for applications to reinforcement components requiring high yield-to-tensile ratio.

Original language	English
Pages (from-to)	287-291
Number of pages	5
Journal	Materials Science and Engineering A
Volume	704
DOIs	https://doi.org/10.1016/j.msea.2017.08.030
Publication status	Published - 2017 Sept 17
Externally published	Yes

Keywords

Dislocation substructures
Lightweight steels
Strain hardening

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.msea.2017.08.030

Cite this

@article{8fa9e579b7f84b57bce5374ccfa0d359,

title = "Achievement of high yield strength and strain hardening rate by forming fine ferrite and dislocation substructures in duplex lightweight steel",

abstract = "Lightweight steels containing a considerable content of Al show high specific strength and ductility, but there are some drawbacks such as low yield strength and stringer-type bands formed along the rolling direction. Here we design new duplex lightweight steel in order to complement the drawbacks, and achieve ultra-high yield strength (865 MPa), good ductility (41%). Submicron ferrite mainly affects high yield-to-tensile ratio, and high strain hardening is attributed to Lomer-Cottrell lock and planar slip, and cell structure by further deformation in austenite. These results are expected to provide a desirable possibility for applications to reinforcement components requiring high yield-to-tensile ratio.",

keywords = "Dislocation substructures, Lightweight steels, Strain hardening",

author = "Hyejin Song and Jisung Yoo and Sohn, {Seok Su} and Minseo Koo and Sunghak Lee",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

month = sep,

day = "17",

doi = "10.1016/j.msea.2017.08.030",

language = "English",

volume = "704",

pages = "287--291",

journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",

issn = "0921-5093",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Achievement of high yield strength and strain hardening rate by forming fine ferrite and dislocation substructures in duplex lightweight steel

AU - Song, Hyejin

AU - Yoo, Jisung

AU - Sohn, Seok Su

AU - Koo, Minseo

AU - Lee, Sunghak

PY - 2017/9/17

Y1 - 2017/9/17

N2 - Lightweight steels containing a considerable content of Al show high specific strength and ductility, but there are some drawbacks such as low yield strength and stringer-type bands formed along the rolling direction. Here we design new duplex lightweight steel in order to complement the drawbacks, and achieve ultra-high yield strength (865 MPa), good ductility (41%). Submicron ferrite mainly affects high yield-to-tensile ratio, and high strain hardening is attributed to Lomer-Cottrell lock and planar slip, and cell structure by further deformation in austenite. These results are expected to provide a desirable possibility for applications to reinforcement components requiring high yield-to-tensile ratio.

AB - Lightweight steels containing a considerable content of Al show high specific strength and ductility, but there are some drawbacks such as low yield strength and stringer-type bands formed along the rolling direction. Here we design new duplex lightweight steel in order to complement the drawbacks, and achieve ultra-high yield strength (865 MPa), good ductility (41%). Submicron ferrite mainly affects high yield-to-tensile ratio, and high strain hardening is attributed to Lomer-Cottrell lock and planar slip, and cell structure by further deformation in austenite. These results are expected to provide a desirable possibility for applications to reinforcement components requiring high yield-to-tensile ratio.

KW - Dislocation substructures

KW - Lightweight steels

KW - Strain hardening

UR - http://www.scopus.com/inward/record.url?scp=85027420693&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2017.08.030

DO - 10.1016/j.msea.2017.08.030

M3 - Article

AN - SCOPUS:85027420693

SN - 0921-5093

VL - 704

SP - 287

EP - 291

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

ER -

Achievement of high yield strength and strain hardening rate by forming fine ferrite and dislocation substructures in duplex lightweight steel

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this