Thermoviscoplastic modeling of the shearing process for mechanism-driven fine blanking of high manganese steel
Frank SCHWEINSHAUPT, Martina MÜLLER, Tim HERRIG, Thomas BERGS
Abstract. The sheared surface hardening resulting during fine blanking of high manganese steel (HMnS) offers potential for increasing fatigue and wear resistance and thus for substituting heat treatment for tribologically stressed fine blanked parts. The stresses and temperatures occurring in the shear zone lead to interactions with the alloy design-dependent deformation mechanisms of HMnS, which influences the achievable sheared surface hardening as well as quality. In order to develop an alloy design for HMnS tailored to the shearing process to achieve high deformation mechanism-driven sheared surface hardening while maintaining high quality, knowledge of the stress state and temperature in the shear zone is required. This paper deals with thermoviscoplastic material modeling of HMnS X40MnCrAlV19-2 Low Yield (LY) for numerical analysis of the shearing process during fine blanking. For this purpose, stack compression tests were carried out with variation of temperature and strain rate. The flow curves derived from the compression tests were extrapolated to determine the parameters for a temperature- and strain rate-dependent flow curve model according to Hensel-Spittel using regression analysis. Based on a thermally coupled finite element (FE) model for fine blanking, various extrapolated flow curve parameters were analyzed numerically and compared with force and temperature measurements from experimental fine blanking tests. The Hensel-Spittel modeling derived from the combined Swift-Voce extrapolation showed a sufficiently accurate correspondence to the experimental results regarding the numerical blanking force and sheared surface temperature.
Keywords
Thermoviscoplastic Model, High Manganese Steel, Fine Blanking, Shearing
Published online 5/7/2025, 12 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Frank SCHWEINSHAUPT, Martina MÜLLER, Tim HERRIG, Thomas BERGS, Thermoviscoplastic modeling of the shearing process for mechanism-driven fine blanking of high manganese steel, Materials Research Proceedings, Vol. 54, pp 1856-1867, 2025
DOI: https://doi.org/10.21741/9781644903599-199
The article was published as article 199 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.
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