Effect of micro-alloying elements on the stretch-flangeability of dual phase steel
SCIE
SCOPUS
- Title
- Effect of micro-alloying elements on the stretch-flangeability of dual phase steel
- Authors
- Jewoong Lee; Seok Jae Lee; De Cooman, BC
- Date Issued
- 2012-02-28
- Publisher
- ELSEVIER
- 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. (C) 2012 Elsevier B.V. All rights reserved.
- Keywords
- Micro-alloying element; Stretch-flangeability; Hole expansion ratio; Dual phase steel; HOLE EXPANSION; SHEET STEELS; NIOBIUM; MICROSTRUCTURE; TRANSFORMATION; TENSILE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/16606
- DOI
- 10.1016/J.MSEA.2012.01.003
- ISSN
- 0921-5093
- Article Type
- Article
- Citation
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, vol. 536, page. 231 - 238, 2012-02-28
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