Project Status: finished
The aim of the subproject SP1 of the delocalized research unit 552
foundet by the German Research Foundation DFG is in the second runtime
besides the determination of the thermal and tribological properties the
description of the mechanical material behavior of the quenchenable
boron-manganese steel 22MnB5. Herefore the focus is among others on the
flow behavior in dependency of the for the hot forming relevant
temperature range and up to a strain rate of 10. Furthermore the option
to be capable to perform mechanical material tests in a Gleeble 3500
system (Dynamic systems Inc.), acquired within the scope of the
excellence cluster, enables the determination of the flow behavior of
the boron manganese steel 22MnB5 in the state of compression following
the time temperature profile of the hot stamping process. For the
compression layer test, specimens out of piled sheet metal blanks had
been heated up to 950 °C, austenitized and after a quenching operation
tested isothermal in a range of 500 °C and 850 °C.
Stöhr, T.; Merklein, M.:
Investigations on the Flow Behavior of Boron-Manganese Steels at elevated strain rates.
In: Steinhoff, K.; Oldenburg, M.; Prakash, B. (Edt.): Proceedings 3rd International Conference on Hot Sheet Metal Forming of High-Performance Steel, 3(2011), Auerbach, Germany: Verlag Wissenschaftliche Scripten, pp. 115-122
Merklein, M.; Stöhr, T.; Svec, T.; Wieland, M.:
Investigations on Parameters Influencing Thermal and Frictional Properties within Hot Stamping.
In: Arbeitsgemeinschaft Wärmebehandlung und Werstofftechnik e. V. Mittemeijer, E. J.; Scholtes, B.; Altena, H. (Edt.): Journal of Heat Treatment and Materials, (2011)6, München: Carl Hanser Verlag, pp. 335-341
Borsetto, F.; Ghiotti, A.; Bruschi, S.; Stöhr, T.; Lechler, J.; Merklein, M.:
Interlaboratory Comparison of Friction Conditions in Hot Stamping Operations.
In: Merklein, M.; Bach, F.-W.; Bouzakis, K.-D., Denkena, B.; Geiger, M.; Toenshoff, H.-K. (Edt.): Proc. 8th International Conference THE Coatings in Manufacturing Engineering, 438(2010), Zurich, Switzerland: Trans Tech Publications Ltd., pp. 97-105
Bosetti, P.; Bruschi, S.; Stöhr, T.; Lechler, J.; Merklein, M.:
Interlaboratory comparison for heat transfer coefficient identification in hot stamping of high strength steels.
In: UNIVERSITY OF BRESCIA (Edt.): Proceedings of Esaform 2010, (2010), Paris: Springer, published on CD
Merklein, M.; Wieland, M.; Stöhr, T.; Lechler, J.; Grüner, M.:
Analytic Methods for the Calculation of the Heat Transfer Coefficient.
In: International Review of Mechanical Engineering, (2010)4, Neapel: Praise Worthy Prize S.r.l, pp. 208-215
Merklein, M.; Lechler, J.; Stöhr, T.; Svec, T.:
Herstellung von funktionsoptimierten Bauteilen im Presshärtprozess.
In: Stahlinstitut VDeH (Edt.): Stahl und Eisen, (2010)6, Düsseldorf: Verlag Stahleisen GmbH, pp. 51-57
Lamprecht, K.; Deinzer, G.; Stich, A.; Lechler, J.; Stöhr, T.; Merklein, M.:
Thermo-Mechanical Properties of Tailor Welded Blanks in Hot Sheet Metal Forming Processes.
In: Kolleck, R. (Edt.): Proc. 50th Conference of IDDRG 2010, (2010)50, Graz: Verlag der Technischen Universität Graz, pp. 37-48
Lechler, J.; Stöhr, T.; Kuppert, A.; Merklein, M.:
Basic Investigations on Hot Stamping of Tailor Welded Blanks Regarding the Manufacturing of Lightweight Components with Functionally Optimized Mechanical Properties.
In: Society of Manufacturing Engineers (Edt.): Proceedings of NAMRC, 38(2010), Michigan, USA, pp. 593-600
Merklein, M.; Svec, T.; Stöhr, T.; Wieland, M.:
Maßgeschneidert – Funktionsoptimierte Strukturbauteile im Presshärtprozess.
In: J. Winterhagen (Edt.): lightweight-design, 5(2010), Wiesbaden: Vieweg+Teuber, pp. 52-57
Stöhr, T.; Merklein, M.:
Beschreibung des mechanischen Werkstoffverhaltens beim Warmumformen höchstfester Stähle.
In: Merklein, M. (Edt.): Tagungsband 5. Erlanger Workshop Warmblechumformung, (2010), Bamberg: Meisenbach, pp. 39-62
Borsetto, F.; Ghiotti, A.; Bruschi, S.; Stöhr, T.; Lechler, J.; Merklein, M.:
Interlaboratory Comparison of Friction Conditions in Hot Stamping Operations.
In: Merklein, M.; Bach, F.-W.; Bouzakis, K.-D., Denkena, B.; Geiger, M.; Toenshoff, H.-K. (Edt.): Key Engineering Materials, 438(2010), Zurich, pp. 97-105
Lechler, J.; Stöhr, T.; Kuppert, A.; Merklein, M.:
Basic Investigations on Hot Stamping of Tailor Welded Blanks Regarding the Manufacturing of Lightweight Components with Functionally Optimized Mechanical Properties.
In: Transactions of the North American Manufacturing Research Institution of SME 2010, 38(2010), Dearborn, Michigan, USA: Society of Manufacturing Engineers, pp. 593-600
Merklein, M.; Lechler, J.; Stöhr, T.:
Investigations on the thermal behavior of ultra high strength boron manganese steels within hot stamping.
In: Boogaard, Akkerman (Edt.): Proceedings ESAFORM 2009, (2009), Paris: Springer, pp. 259-262
Stöhr, T.; Lechler, J.; Merklein, M.:
Investigations on different strategies for influencing the microstructural properties with respect to partial hot stamping.
In: Steinhoff, K.; Oldenburg, M.; Prakash, B. (Edt.): Proceedings 2nd International Conference Hot Sheet Metal Forming of High-Performance Steel - CHS², (2009), Auerbach: Verlag Wissenschaftliche Scripten, pp. 273-281
Nedelcu, D.; Stöhr, T.; Ciofu, C.; Mindru, D:
Some aspects concerning the physical models obtained using high performance composite material.
In: Nedelcu, Slatineanu, Mazuru (Edt.): Proceedings 13th International Conference ModTech, (2009), Iasi: Editura Acreditata CNCSIS, pp. 455-458
Stöhr, T.; Merklein, M.:
Weiterführende Untersuchungen zum Fließverhalten presshärtbarer Stähle.
In: Merklein, M.; Lechler, J. (Edt.): Tagungsband 4. Erlanger Workshop Warmblechumformung, (2009), Bamberg: Meisenbach, pp. 71-84
Glatzer, M.; Stöhr, T.; Merklein, M.; Sikora, S.:
Einfluß unterschiedlicher Wärmebehandlungsrouten auf die Robustheit und Höhe der mechanischen Eigenschaften des Stahls 22MnB5.
In: Merklein, M.; Lechler, J. (Edt.): Tagungsband 4. Erlanger Workshop Warmblechumformung, (2009), Bamberg: Meisenbach, pp. 85-105
Odenberger, E-L.; Oldenburg; M.; Thilderkvist, P.; Stöhr, T.; Lechler, J.; Merklein, M.:
Tool development based on modelling and simulation of hot sheet metal forming in titanium Ti-6Al-4V .
In: Eva-Lis Odenberger (Edt.): Concepts for Hot Sheet Metal Forming of Titanium Alloys, (2009), Lulea: Universitetstryckeriet Lulea, pp. 1-17
Odenberger, E-L.; Hertzman, J.; Thilderkvist, P.; Merklein, M.; Kuppert, A.; Stöhr, T.; Lechler, J.; Oldenburg, M.:
Thermo mechanical sheet metal forming of aero engine components in Ti-6Al-4V - PART 1: Material characterisation.
In: Eva-Lis Odenberger (Edt.): Concepts for Hot Sheet Metal Forming of Titanium Alloys, (2009), Lulea: Universitetstryckeriet Lulea, pp. 1-18
Merklein, M.; Lechler, J.; Stöhr, T.:
Investigations on the thermal behavior of ultra high strength boron manganese steels within hot stamping.
In: International Journal of Material Forming , (2009), Paris: Springer, pp. 259-262
Merklein, M.; Lechler, J.; Stöhr, T.:
Characterization of tribological and thermal properties of metallic coatings for hot stamping boron-manganese steels.
In: Bouzakis, K.-D. (Edt.): Tagungsband The Coatings, (2008), Thessaloniki: Ziti, pp. 219-228
Springer, R.; Lechler, J.; Stöhr, T.; Karbasian, H.; Schaper, M.; Merklein, M.; Brosius, A.; Tekkaya, A.E.:
Prognose der mechanischen Bauteileigenschaften bei Presshärtprozessen anhand mikrostruktureller und umformtechnischer Zusammenhänge.
In: MERKLEIN, M. (Edt.): Tagungsband 3. Erlanger Workshop Warmblechumformung, (2008), Bamberg: Meisenbach, pp. 87-106
Stöhr, T.; Merklein, M.; Lechler, J.:
Determination of frictional and thermal characteristics for hot stamping with respect to a numerical process design.
In: Steinhoff, K.; Oldenburg, M. (Edt.): Proceedings 1st International Conference Hot Sheet Metal Forming of High-Performance Steel - CHS2, (2008), Bad Harzburg: Grips Media, pp. 293-300
