Hardening Behavior Characterization of Dual Phase Steels

  • Kemal Davut Department of Metallurgical and Materials Engineering, Atılım University, Ankara; Atılım University, Metal Forming Center of Excellence, Ankara, Turkey http://orcid.org/0000-0002-9860-881X
  • Caner Simsir Atılım University, Department of Manufacturing Engineering, Ankara, Turkey; Atılım University, Metal Forming Center of Excellence, Ankara, Turkey http://orcid.org/0000-0001-9520-4695
  • Baris Cetin Department of endineering and Research, FNSS Defense Systems Co. Inc., Ankara http://orcid.org/0000-0001-8615-8383

Abstract

The requirements for higher passenger safety, improved fuel economy and weight reduction in automobile industry necessitates the usage of advanced high strength steel (AHSS) grades. Dual phase (DP) steels are the most widely used one among AHSS. DP steels become increasingly popular, since they provide a combination of sufficient formability at room temperature and tensile strength over 1000 MPa. The current standards for DP steels only specifies yield and tensile strength. Steels from various producers have considerably different composition and microstructure; however they still have the same grade name. Combined with the inherited heterogeneous microstructure, those steels exhibit different hardening behavior. The aim of this study is to evaluate the hardening behavior of DP800 steels, obtained from different vendors and thus having different compositions and microstructures. The hardening behavior was characterized with tensile tests performed along rolling and transverse directions. The microstructure has been characterized with optical and scanning electron microscopes. The martensite fraction, grain size of ferrite and type and fraction of alloying elements has been correlated to the hardening behavior.

Keywords:

Dual phase steels, hardening behavior, alloying design

DOI: 10.17350/HJSE19030000107

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Published
2018-07-02
How to Cite
Davut, K., Simsir, C., & Cetin, B. (2018). Hardening Behavior Characterization of Dual Phase Steels. Hittite Journal of Science & Engineering, 5(4), 301-306. Retrieved from https://www.hjse.hitit.edu.tr/hjse/index.php/HJSE/article/view/HJSE19030000107
Section
ENGINEERING