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Determination of material properties for hot hydroforming

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Abstract

For the process design of hydroforming in the “hot” temperature range, reliable data are necessary to describe the material behaviour at elevated temperatures under the occurring loads of hot hydroforming processes. State-of-the-art technologies for the investigation of material behaviour, like uniaxial tensile tests or hydraulic bulge tests, do not provide enough similarity with the process of hot hydroforming. This paper describes a new testing technique, capable of realizing high process temperatures and constant strain rates. It represents a further development of the established technology of tube bulge tests. The hardware is described, its functionality is proven and mathematical approaches for the calculation of stress/strain-curves from experimental data are presented.

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Acknowledgments

The authors express their thanks to the DFG (Deutsche Forschungsgemeinschaft) for the support of the project “Untersuchung des Werkstoffverhaltens bei der Warm-Innenhochdruck-Umformung (GR 1818/34-1). The achievements described in this paper mainly result from this project.

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  1. Institute for Production Engineering and Forming Machines, TU Darmstadt, Petersenstrasse 30, 64287, Darmstadt, Germany

    D. Elsenheimer & P. Groche

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  1. D. Elsenheimer
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  2. P. Groche
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Correspondence to D. Elsenheimer.

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Elsenheimer, D., Groche, P. Determination of material properties for hot hydroforming. Prod. Eng. Res. Devel. 3, 165–174 (2009). https://doi.org/10.1007/s11740-009-0156-2

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