Effect of micro-alloying elements on the stretch-flangeability of dual phase steel

Jewoong Lee; Seok Jae Lee; Bruno C. De Cooman

doi:10.1016/j.msea.2012.01.003

Effect of micro-alloying elements on the stretch-flangeability of dual phase steel

Jewoong Lee
, Seok Jae Lee^*
, Bruno C. De Cooman

^*Corresponding author for this work

Metallurgical System Engineering

Pohang University of Science and Technology

Research output: Contribution to journal › Journal article › peer-review

83 Scopus citations

Abstract

The present paper investigates the effect of micro-alloying elements on the stretch-flangeability of a conventional dual phase steel by means of microstructural analysis and hole expansion tests. The addition of micro-alloying elements suppressed the formation of new ferrite from the intercritical austenite and induced a finer grain size which increased the strength of the steel. The increased amount of intercritical ferrite formed at higher annealing temperature resulted in an improved stretch-flangeability by simultaneously increasing the elongation and decreasing the strength. The addition of 200. ppm Nb was beneficial for the hole expansion performance whereas a detrimental effect on hole expandability was found after the addition of 400. ppm Nb to the dual phase steel.

Original language	English
Pages (from-to)	231-238
Number of pages	8
Journal	Materials Science and Engineering: A
Volume	536
DOIs	https://doi.org/10.1016/j.msea.2012.01.003
State	Published - 2012.02.28

Keywords

Dual phase steel
Hole expansion ratio
Micro-alloying element
Stretch-flangeability

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title = "Effect of micro-alloying elements on the stretch-flangeability of dual phase steel",

abstract = "The present paper investigates the effect of micro-alloying elements on the stretch-flangeability of a conventional dual phase steel by means of microstructural analysis and hole expansion tests. The addition of micro-alloying elements suppressed the formation of new ferrite from the intercritical austenite and induced a finer grain size which increased the strength of the steel. The increased amount of intercritical ferrite formed at higher annealing temperature resulted in an improved stretch-flangeability by simultaneously increasing the elongation and decreasing the strength. The addition of 200. ppm Nb was beneficial for the hole expansion performance whereas a detrimental effect on hole expandability was found after the addition of 400. ppm Nb to the dual phase steel.",

keywords = "Dual phase steel, Hole expansion ratio, Micro-alloying element, Stretch-flangeability",

author = "Jewoong Lee and Lee, \{Seok Jae\} and \{De Cooman\}, \{Bruno C.\}",

year = "2012",

month = feb,

day = "28",

doi = "10.1016/j.msea.2012.01.003",

language = "English",

volume = "536",

pages = "231--238",

journal = "Materials Science and Engineering: A",

issn = "0921-5093",

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TY - JOUR

T1 - Effect of micro-alloying elements on the stretch-flangeability of dual phase steel

AU - Lee, Jewoong

AU - Lee, Seok Jae

AU - De Cooman, Bruno C.

PY - 2012/2/28

Y1 - 2012/2/28

N2 - The present paper investigates the effect of micro-alloying elements on the stretch-flangeability of a conventional dual phase steel by means of microstructural analysis and hole expansion tests. The addition of micro-alloying elements suppressed the formation of new ferrite from the intercritical austenite and induced a finer grain size which increased the strength of the steel. The increased amount of intercritical ferrite formed at higher annealing temperature resulted in an improved stretch-flangeability by simultaneously increasing the elongation and decreasing the strength. The addition of 200. ppm Nb was beneficial for the hole expansion performance whereas a detrimental effect on hole expandability was found after the addition of 400. ppm Nb to the dual phase steel.

AB - The present paper investigates the effect of micro-alloying elements on the stretch-flangeability of a conventional dual phase steel by means of microstructural analysis and hole expansion tests. The addition of micro-alloying elements suppressed the formation of new ferrite from the intercritical austenite and induced a finer grain size which increased the strength of the steel. The increased amount of intercritical ferrite formed at higher annealing temperature resulted in an improved stretch-flangeability by simultaneously increasing the elongation and decreasing the strength. The addition of 200. ppm Nb was beneficial for the hole expansion performance whereas a detrimental effect on hole expandability was found after the addition of 400. ppm Nb to the dual phase steel.

KW - Dual phase steel

KW - Hole expansion ratio

KW - Micro-alloying element

KW - Stretch-flangeability

UR - https://www.scopus.com/pages/publications/84862817460

U2 - 10.1016/j.msea.2012.01.003

DO - 10.1016/j.msea.2012.01.003

M3 - Journal article

AN - SCOPUS:84862817460

SN - 0921-5093

VL - 536

SP - 231

EP - 238

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Effect of micro-alloying elements on the stretch-flangeability of dual phase steel

Abstract

Keywords

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