On 28 June, Christoph Kock presented his doctoral thesis entitled "Modification of the residual stress distribution in hot forged components". The focus of the presentation was to explain how the residual stress distribution in hot forging processes can be specifically adapted with the help of FE simulations and what role spray cooling plays in this.
The focus of the dissertation is the in-depth and holistic investigation of the interaction of thermal, metallurgical and mechanical material phenomena for the purpose of modifying the residual stress distribution. The aim was to introduce beneficial residual compressive stresses in areas close to the surface through targeted control of forming and subsequent cooling. Due to the complex interactions, the process was designed numerically. Christoph Kock improved the simulation quality through detailed as well as further developed methods of material characterisation and modelling of thermo-mechanical-metallurgical phenomena. In final experimental investigations, the targeted modification and quality of the FE model were successfully demonstrated. Overall, a knowledge base and the necessary FE tools for further steps towards improved component performance in operation through modified residual stress distributions with simultaneously more efficient and productive manufacturing through customised process control.
In addition to the main topics of his research, he has also supervised other projects in the field of hot forging. Christoph Kock has laid many foundations through his own initiative and his motivation to break new ground.
The IFUM and his colleagues congratulate Christoph Kock on his successful completion of his doctorate and wish him every success in his future career.
