This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
1.2GPa Advanced High Strength Steel with High Formability
Technical Paper
2014-01-0991
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
To reduce the Body in White (BIW) mass, it is necessary to expand the application of Advanced High-Strength Steels (AHSS) to complex shaped parts. In order to apply AHSS to complex shaped parts with thinner gauge, high formability steel is required. However, higher strength steels tend to display lower elongations, compared with low/medium strength steels. Current AHSS are applied to limited parts for this reason. The new 1.2GPa material, with high formability, was developed to solve this issue.
The mechanical property targets for the high elongation 1.2GPa material were achieved by precise metallurgical optimization. Many material aspects were studied, such as formability, weldabilty, impact strength, and delayed fracture.
As the result of this development, 1.2GPa AHSS has been applied to a new vehicle launched in 2013.The application of this material was the 1st in the world, and achieved a 11kg mass reduction.
Recommended Content
Citation
Kondo, T. and Ishiuchi, K., "1.2GPa Advanced High Strength Steel with High Formability," SAE Technical Paper 2014-01-0991, 2014, https://doi.org/10.4271/2014-01-0991.Also In
References
- Sakuma , Y. , Hiwatashi , S. , and Oikawa , H. Advisable Grades of High-Strength Steel Sheets and Welding Conditions for Spot-Weld Strength in Automotive Body Application SAE Technical Paper 2003-01-2774 2003 10.4271/2003-01-2774
- Takakura , K. , Takagi , K. , and Yoshinaga , N. Application Development of Low Carbon Type Dual Phase 980MPa High Strength Steel SAE Technical Paper 2006-01-1586 2006 10.4271/2006-01-1586
- Mimer M. et al. Process Adjustments to Improve Fracture Behaviour in Resistance Spot Welds of EHSS and UHSS Welding in the World 2004 48 14 18
- Tanae , T. and Dykeman , J. Application of 590/780MPa Grade TRIP Steel to Body-in-White SAE Technical Paper 2006-01-1585 2006 10.4271/2006-01-1585
- Yoshida H. Improvement of Impact Energy Absorption by Using of High Strength Steel, Part 2 JSAE Review 106-02 2002
- Yoshitake A. et al Mechanical Properties of High Strength Steel Sheet as BIW Structural Material JSAE Symposium 80-00 2001
- Matsuyama Sinichi Delayed-fracture NIKKAN KOGYO SHIMBUN 79 1989
- Kasuya Y. et al Effect of Alloying Elements and Annealing Conditions on Tensile Properties of TRIP-Aided Steel Sheet with Bainitic Ferrite Matrix KOBELCO technical report 57 2 27 30 2007