Development of high strength hot rolled low carbon copper-bearing steel containing nanometer sized carbides

M. P. Phaniraj; Young Min Shin; Joonho Lee; Nam Hoon Goo; Dong Ik Kim; Jin Yoo Suh; Woo Sang Jung; Jae Hyeok Shim; In Suk Choi

doi:10.1016/j.msea.2015.02.067

Development of high strength hot rolled low carbon copper-bearing steel containing nanometer sized carbides

M. P. Phaniraj, Young Min Shin, Joonho Lee, Nam Hoon Goo, Dong Ik Kim, Jin Yoo Suh, Woo Sang Jung, Jae Hyeok Shim, In Suk Choi

Department of Materials Science and Engineering

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

27 Citations (Scopus)

Abstract

A low carbon ferritic steel was alloyed with Ti, Mo and Cu with the intention of achieving greater increment in strength by multiple precipitate strengthening. The steel is hot rolled and subjected to interrupted cooling to enable precipitation of Ti-Mo carbides and copper. Thermodynamic calculations were carried out to determine equilibrium phase fractions at different temperatures. Microstructure characterization using transmission electron microscopy and composition analysis revealed that the steel contains ~5. nm size precipitates of (Ti,Mo)C. Precipitation kinetics calculations using MatCalc software showed that mainly body centered cubic copper precipitates of size <. 5nm form under the cooling conditions in the present study. The steel has the high tensile strength of 853. MPa and good ductility. The yield strength increases by 420. MPa, which is more than that achieved in hot rolled low carbon ferritic steels with only copper precipitates or only carbide precipitates. The precipitation and strengthening contribution of copper and (Ti,Mo)C precipitates and their effect on the work hardening behavior is discussed.

Original language	English
Pages (from-to)	1-8
Number of pages	8
Journal	Materials Science and Engineering A
Volume	633
DOIs	https://doi.org/10.1016/j.msea.2015.02.067
Publication status	Published - 2015 May 1

Keywords

Copper
HSLA steel
Interrupted cooling
Nano-sized carbides
Numerical simulation

ASJC Scopus subject areas

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

Access to Document

10.1016/j.msea.2015.02.067

Cite this

@article{cbcf37395b5044d9968e79a3b23cf994,

title = "Development of high strength hot rolled low carbon copper-bearing steel containing nanometer sized carbides",

abstract = "A low carbon ferritic steel was alloyed with Ti, Mo and Cu with the intention of achieving greater increment in strength by multiple precipitate strengthening. The steel is hot rolled and subjected to interrupted cooling to enable precipitation of Ti-Mo carbides and copper. Thermodynamic calculations were carried out to determine equilibrium phase fractions at different temperatures. Microstructure characterization using transmission electron microscopy and composition analysis revealed that the steel contains ~5. nm size precipitates of (Ti,Mo)C. Precipitation kinetics calculations using MatCalc software showed that mainly body centered cubic copper precipitates of size <. 5nm form under the cooling conditions in the present study. The steel has the high tensile strength of 853. MPa and good ductility. The yield strength increases by 420. MPa, which is more than that achieved in hot rolled low carbon ferritic steels with only copper precipitates or only carbide precipitates. The precipitation and strengthening contribution of copper and (Ti,Mo)C precipitates and their effect on the work hardening behavior is discussed.",

keywords = "Copper, HSLA steel, Interrupted cooling, Nano-sized carbides, Numerical simulation",

author = "Phaniraj, {M. P.} and Shin, {Young Min} and Joonho Lee and Goo, {Nam Hoon} and Kim, {Dong Ik} and Suh, {Jin Yoo} and Jung, {Woo Sang} and Shim, {Jae Hyeok} and Choi, {In Suk}",

note = "Funding Information: The authors gratefully acknowledge the financial support provided by the Korea Institute of Science and Technology (Grant nos. 2E25322 and 2Z04520 ). Publisher Copyright: {\textcopyright} 2015 Elsevier B.V.",

year = "2015",

month = may,

day = "1",

doi = "10.1016/j.msea.2015.02.067",

language = "English",

volume = "633",

pages = "1--8",

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

issn = "0921-5093",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Development of high strength hot rolled low carbon copper-bearing steel containing nanometer sized carbides

AU - Phaniraj, M. P.

AU - Shin, Young Min

AU - Lee, Joonho

AU - Goo, Nam Hoon

AU - Kim, Dong Ik

AU - Suh, Jin Yoo

AU - Jung, Woo Sang

AU - Shim, Jae Hyeok

AU - Choi, In Suk

N1 - Funding Information: The authors gratefully acknowledge the financial support provided by the Korea Institute of Science and Technology (Grant nos. 2E25322 and 2Z04520 ). Publisher Copyright: © 2015 Elsevier B.V.

PY - 2015/5/1

Y1 - 2015/5/1

N2 - A low carbon ferritic steel was alloyed with Ti, Mo and Cu with the intention of achieving greater increment in strength by multiple precipitate strengthening. The steel is hot rolled and subjected to interrupted cooling to enable precipitation of Ti-Mo carbides and copper. Thermodynamic calculations were carried out to determine equilibrium phase fractions at different temperatures. Microstructure characterization using transmission electron microscopy and composition analysis revealed that the steel contains ~5. nm size precipitates of (Ti,Mo)C. Precipitation kinetics calculations using MatCalc software showed that mainly body centered cubic copper precipitates of size <. 5nm form under the cooling conditions in the present study. The steel has the high tensile strength of 853. MPa and good ductility. The yield strength increases by 420. MPa, which is more than that achieved in hot rolled low carbon ferritic steels with only copper precipitates or only carbide precipitates. The precipitation and strengthening contribution of copper and (Ti,Mo)C precipitates and their effect on the work hardening behavior is discussed.

AB - A low carbon ferritic steel was alloyed with Ti, Mo and Cu with the intention of achieving greater increment in strength by multiple precipitate strengthening. The steel is hot rolled and subjected to interrupted cooling to enable precipitation of Ti-Mo carbides and copper. Thermodynamic calculations were carried out to determine equilibrium phase fractions at different temperatures. Microstructure characterization using transmission electron microscopy and composition analysis revealed that the steel contains ~5. nm size precipitates of (Ti,Mo)C. Precipitation kinetics calculations using MatCalc software showed that mainly body centered cubic copper precipitates of size <. 5nm form under the cooling conditions in the present study. The steel has the high tensile strength of 853. MPa and good ductility. The yield strength increases by 420. MPa, which is more than that achieved in hot rolled low carbon ferritic steels with only copper precipitates or only carbide precipitates. The precipitation and strengthening contribution of copper and (Ti,Mo)C precipitates and their effect on the work hardening behavior is discussed.

KW - Copper

KW - HSLA steel

KW - Interrupted cooling

KW - Nano-sized carbides

KW - Numerical simulation

UR - http://www.scopus.com/inward/record.url?scp=84924985596&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2015.02.067

DO - 10.1016/j.msea.2015.02.067

M3 - Article

AN - SCOPUS:84924985596

SN - 0921-5093

VL - 633

SP - 1

EP - 8

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

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

ER -

Development of high strength hot rolled low carbon copper-bearing steel containing nanometer sized carbides

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this