Strain rates in high velocity forming of foils

Strain rates in high velocity forming of foils


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Abstract. Energy- and working media based high velocity forming processes show various advantages forming metal foils. However, due to different process characteristics, differences in workpiece response by impulse transfer for different high velocity forming processes are expected. Free forming experiments with 50 µm metallic foils were carried out to identify the process influence, using electromagnetic forming and laser shock forming. For these two forming methods the response of the workpiece was described. The description was done by in-situ measurement of the strain and the strain rate over time and determination of workpiece velocities.

Forming, In-Process Measurement, Electromagnetic Forming, Laser Shock Forming

Published online 4/24/2024, 9 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: LANGSTÄDTLER Lasse, BECKSCHWARTE Björn, VALENTINO Tobias, RADEL Tim, Strain rates in high velocity forming of foils, Materials Research Proceedings, Vol. 41, pp 1527-1535, 2024


The article was published as article 169 of the book Material Forming

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

[1] D.R. Kennedy, History of the shaped charge effect: The first 100 years, (1983).
[2] G. Avrillaud et al., Examples of How Increased Formability through High Strain Rates Can Be Used in Electro-Hydraulic Forming and Electromagnetic Forming Industrial Applications, J. of Man. and Mat. Pro. 5 (3), (2021) 96.
[3] H.-G. Noh et al., Two-step electromagnetic forming process using spiral forming coils to deform sheet metal in a middle-block die, Int J Adv Man. Technol., 76 (9-12), (2015) 1691-1703.
[4] X. Cui et al., Springback Calibration of a U-Shaped Electromagnetic Impulse Forming Process, Metals 9 (5) 603.
[5] Z Lai et al., Application of Electromagnetic Forming as a Light-Weight Manufacturing Method for Large-Scale Sheet Metal Parts, (2018).
[6] M. Geiger et al., Microforming, CIRP Annals 50 (2), (2001) 445-462.
[7] S. Veenaas et al., Determination of forming speed at a laser shock stretch drawing process, Proceedings of the 7th ICHSF, (2016) 105-114.
[8] B. Kuhfuss et al., Electromagnetic Linked Micro Parts Processing, Proc. Eng. 81, (2014) 2135-2140.
[9] Z. Long et al., Electromagnetic micro-forming using flat spiral coil, Int. J. Adv. Manuf. Technol. 121 (1-2), (2022) 1161-1171.
[10] Z. Zimniak, Plastic Deformation Zone in Electromagnetic Cutting, Archives of Metallurgy and Materials 62 (4), (2017) 2303-2308.
[11] M. Kamal et al., Agile manufacturing of a micro-embossed case by a two-step electromagnetic forming process, J. of Mat. Pro. Tec. 190, (2007) 41-50.
[12] L. Langstädtler et al., Electromagnetic Joining of Thin Sheets by Adapted Pulses, KEM 767, (2018) 439-446.
[13] A. W. Miziolek et al., Laser Induced Breakdown Spectroscopy, Cambridge University Press, (2006).
[14] H. Fenske et al., Tailoring the Pressure Profile of TEA-CO2 Laser-Induced Shock Waves for Mechanical Forming and Separation Processes, Lasers Manuf. Mater. Process. 7 (1), (2020) 1-14.
[15] H. Bühler et al., Ein Beitrag zur Magnetumformung rohrförmiger Werkstücke, Werkstatt und Betrieb 110.9, (1968) 513-516.
[16] B. Beckschwarte et al., Numerical and Experimental Investigation of the Impact of the Electromagnetic Properties of the Die Materials in Electromagnetic Forming of Thin Sheet Metal, J. manuf. mater. process. 5 (1), (2021) 18ff.
[17] T. Valentino, Nutzung laserinduzierter Stoßwellen zur Hochdurchsatz-Werkstoffprüfung, (2021).
[18] E. J. Bruno, High-velocity forming of metals, American Society of Tool and Manufacturing Engineers, (1968).
[19] B. Beckschwarte et al., Response of Thin Sheet Metal on the Excitation in Electromagnetic Forming, Eng. Proc. 26 (1), (2022) 4.