Abstract
Linear flow splitting enables the production of bifurcated profiles out of sheet metal. Included in the Collaborative Research Centre (SFB) 666 the new roll forming procedure uses obtuse angled splitting rolls and supporting rolls to increase the surface of the band edge. High hydrostatic stresses in the deformed zone lead to an elevated formability of the high strength steel ZStE 500. As a result of the process, the flanges consist partially of an UltraFine-Grain microstructure (UFG). Produced parts are characterized by increased stiffness and high surface hardness. The new structure influences the formability in an extensive way. The investigations presented in this paper discuss the further processing of the flanges from linear flow split profiles. Therefore three point bending tests and roll forming experiments are carried out. A finite element analysis to characterize the damage is set up as well.
Article PDF
Avoid common mistakes on your manuscript.
References
Groche, P., Vucic, D., Jöckel, M.: Basics of linear flow splitting, Journal of Material Processing Technology 183 (2007) 249-255
Müller, C., Bohn, T., Bruder, E., Groche, P.: UFG-Microstructures by Linear Flow splitting. Materials Science Forum Vols. 584-586 (2008) pp 68-73
Bohn, C., Bruder, E., Müller, C.: Formation of ultrafine-grained microstructure in HSLA steel profiles by linear flow splitting, Journal of Material Science, Springer, 2008
Gurson, A.L.: Continuum Theory of Ductile Rupture by Void Nucleation and Growth: Part I: Yield Criteria and Flow rules for porous Ductile Media, Journal of Engineering Materials and Technology, January 1977
Bernauer, G.; Brocks, W.: Micromechanical Modelling of ductile Damage and Tearing – Results of a European Numerical Round Robin, Bericht GKSS 2000/15, Institut für Werkstoffforschung, Geesthacht, 2000
Bernauer, G.; Brocks, W.: Micromechanical Modelling of ductile Damage and Tearing – Results of a European Numerical Round Robin, Institut für Werkstoffforschung, Geesthacht, 2000
Lemaitre, J.: A course on damage mechanics. Springer-Verlag Berlin Heidelberg New York, 1992
Just, H.: Erweiterung der Formgebungsgrenzen rissbehafteter Halbwarm-Massivumformprozesse unter Anwendung der Schädigungsmechanik und der Finite Elemente Methode, Diss. 2005, Shaker Verlag
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Taplick, C., Rullmann, F. & Groche, P. Further processing of ultrafine-grain materials. Int J Mater Form 3 (Suppl 1), 833–836 (2010). https://doi.org/10.1007/s12289-010-0899-5
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12289-010-0899-5