Functional surfaces through adiabatic high-speed processes: microstructure, mechanisms and model development

Analyzing the formation of adiabatic shear bands (ASB) and their properties at the cut edges produced by high-speed blanking is the scope of the project. In addition to the material properties, the stress state resulting from the process boundary conditions is identified as another main influencing factor, which is to be systematically investigated by varying the process parameters. Methodically, the experimental investigations are coupled with a comprehensive FEM modeling as a soft sensor for stress, strain rate, and temperature. The process understanding gained in basic experiments is subsequently transferred to complex geometries and used for property control of ASB. A comprehensive understanding of the ASB formation and the resulting ASB properties is aimed at in cooperation with TU Chemnitz, TU Munich as well as Fraunhofer IWU (Chemnitz) and Fraunhofer IWM (Freiburg) within the research group FOR FUND³AMENT.

Schmitz, F., Clausmeyer, T., Hahn, M., Tekkaya, A.E., 2024. Determination of energies in high-speed blanking. Journal of manufacturing processes 124, 1554–1566. https://doi.org/10.1016/j.jmapro.2024.07.028

Schrage, O., Roald Lingbeek, R., Peetsalu, Hahn, M., Dardaei Joghan, H., Korkolis, Y.P. Tekkaya, A. E., 2025, High-speed blanking and its potential for producing ultra-high-strength automotive safety components, MATEC Web of Conferences, Vol.408. https://doi.org/10.1051/matecconf/202540801084

Schrage, O., Dardaei Joghan, H., Hahn, M., Korkolis, Y.P. Tekkaya, A. E., 2025, Production of individual sheet parts using vaporizing foil actuator forming and a flexible liquid-solid tool, Proceedings of the International Conference on High Speed Forming (ICHSF): http://dx.doi.org/10.17877/DE290R-25697