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Department of Mechanical Engineering

Doctoral examination at the IUL

© IUL
Juri Martschin and the examination board
The IUL warmly congratulates Mr. Juri Martschin on successfully completing his doctoral examination. On August 14, 2025, a broad audience attended his doctoral presentation entitled “In-situ Prediction and Setting of Product Properties during Multi-stage Press Hardening in the Progressive Die (In-situ-Vorhersage und Einstellen der Produkteigenschaften beim mehrstufigen Presshärten im Folgeverbundwerkzeug)”.

The presentation was evaluated by Prof. Thomas Meurer from the Digital Process Engineering research group at KIT (Institute for Mechanical Process Engineering and Mechanics, Karlsruhe) and Prof. Tekkaya from the IUL. The examination committee was chaired by Prof. Andreas Menzel from the IM (Institute of Mechanics), with Prof. Moritz Schulze Darup from the RCS (Control and Cyberphysical Systems) of TU Dortmund serving as an additional examiner. In his dissertation, Mr. Martschin developed a progressive die with extended actuation for the targeted setting of product properties, as well as models for their feedback in the context of property-controlled multi-stage press hardening. Particular attention was given to the influence of inhomogeneous rapid austenitization on microstructural evolution and the resulting hardness after multi-stage thermo-mechanical treatment of the materials 22MnB5 and X46Cr13. The developed models and actuators provide essential foundations for the transformation to property controlled forming processes – an important contribution to resource-efficient production in line with the objectives of the SPP2183.