Project Status: finished
In light of increasing oil prices and climate changes the application of process optimized blanks of fast hardenable aluminum alloys, so called Tailored Heat Treated Blanks (THTB), become more and more attractive for applications of car body parts. In this context the project ME 2043/15-1 funded by the DFG aims at the local strengthening of alloys close to serial production by a short-term heat treatment shortly before. The main influencing parameters of the heat treatment on the strengthening of the 6xxx-series aluminum alloys are identified with a conductive heating station. A a process window for the heat treatment is developed out and thermodynamic, material specific mecha-nisms are confirmed using a transmission electron microscope. On the base of these results temperature dependent material models are evolved. In order to optimize the design of the properties distribution of THTB over the sheet plane heat treatment layouts are qualified for simple and complex part geometries.
(a) conductive heating station; (b) tensile test according DIN EN ISO 6892-1
Maier, V.; Hausöl, T.; Schmidt, C. W.; Böhm, W.; Nguyen, H.; Merklein, M.; Höppel, H. W.; Göken, M.:
Tailored Heat-treated Accumulative Roll Bonded Aluminum Blanks: Microstructure and Mechanical Behavior.
In: Laughlin, D.E. (Edt.): Metallurgical and Materials Transactions A, 43(2012)9, Berlin: Springer, pp. 3097-3107
Merklein, M.; Nguyen, H.:
Adjusting Optimzed Material Properties for Tailored Heat Treated Blanks.
In: J.R. Duflou, R. Clarke, M. Merklein, F. Micari, B. Shirvani and K. Kellens (Edt.): Key Engineering Materials, 473(2011), Switzerland: Trans Tech Publications, pp. 420-427
Merklein, M.; Biasutti, M.; Nguyen, H.; Böhm, W.:
Flow Behaviour of Advanced Aluminium Materials.
In: Hirt, G.; Tekkaya, E.A. (Edt.): Steel research international: Special Edition: 10th International Conference on Technology of Plasticity, (2011), Weinheim: Wiley-VCH Verlag GmbH&Co. KGaA, pp. 1066-1071
Nguyen, H.; Merklein, M.:
Advanced laser heat treatment with respect to the application for Tailored Heat Treated Blanks.
In: Schmidt, M.; Vollertsen, F.; Geiger, M. (Edt.): Physics Procedia. Proceedings of the 6th International Conference on Laser Assisted Net Shape Engineering (LANE), 5(2010)2, Amsterdam: Elsevier B. V., pp. 233-242