In her dissertation entitled ‘In-process use of micromagnetic testing methods to detect thermo-mechanical edge zone influences during grinding’, Rahel Jedamski investigated how magnetic Barkhausen noise can be used for quality assurance during the grinding process - and not just afterwards, as was previously the case. 

During grinding - the last step in the production chain - thermally or mechanically induced damage can occur in the edge zone, causing expensive rejects or even failure. Until now, this has usually been detected using chemical etching processes - time-consuming, subjective and not without risk to people and the environment. 

The research of the research scientist from the Physical Analytics department shows that in-process monitoring using Barkhausen noise is possible in principle, reacts sensitively to incipient changes, and thus lays the foundation for future-oriented process control - completely without chemicals, but with great potential for quality, sustainability and resource conservation.

On June 16, she completed her doctorate with a successful doctoral colloquium. Congratulations from the Institute!