On 29 August, Eugen Stockburger presented his doctoral thesis entitled " Experimental and numerical investigations into the mould hardening of martensitic chromium steel ". The general aim of this research work was to numerically model the form hardening of X46Cr13, taking into account the deformation behaviour and forming limit at elevated temperatures, the microstructural transformations and their effects on the resulting component properties.
A possible alternative to 22MnB5 is the use of mould-hardened martensitic chromium steels, such as X46Cr13. Mould hardening with subsequent heat treatment makes it possible to achieve increased tensile strength with significantly higher elongation at break compared to 22MnB5. The focus of the dissertation was on the numerical representation of the form hardening of the martensitic chromium steel X46Cr13, taking into account the material behaviour at elevated temperatures. Eugen Stockburger carried out a comprehensive material characterisation to ensure a realistic numerical representation of the material behaviour. In addition, he further developed the tests required for material characterisation in accordance with the requirements of the subsequent process chain. With the help of new analytical modelling approaches, the material behaviour of the material was described and implemented in the simulation. The applicability was tested in various experimental demonstrator processes such as die bending, deep drawing and shear cutting. Overall, the material characterisation in combination with the developed material model made it possible to realistically describe the form hardening of the martensitic chromium steel X46Cr13. This provides an efficient way of numerically designing complex mould hardening processes for X46Cr13 chromium steel.
In addition to the main topics of his research, he has also supervised other projects in the field of sheet metal forming and material characterisation. He has also provided support in lectures. Eugen Stockburger has laid many foundations through his own initiative and his motivation to break new ground.
The IFUM and his colleagues congratulate Eugen Stockburger on his successful completion of his doctorate and wish him every success in his future career.
