Karriere am WZL


Masterarbeit oder Bachelorarbeit

am Forschungsbereich Technologie der Fertigungsverfahren, Abteilung Abtragende Fertigungsverfahren, Gruppe Funkenerosive Bearbeitung (EDM)

Experiments to Determine Energy Distribution in EDM of Aerospace Alloys

Since high-strength materials are more and more used in turbomachinery components, machining processes for these materials have to be optimized continuously. Fortunately, electrical discharge machining (EDM) is able to machine materials independently from their strength, which makes it a predestined process for turbomachinery components. In this context titanium alloys are very important materials to be applied and machined.

Despite EDM being an appropriate process for the machining of most metals, titanium alloys are not easy to be machined. This is likely due to the formation of a titanium carbide phase during machining, which reduces the amount of thermal energy available for removal of the base alloy.

In this bachelor or master thesis you will investigate the energy balance during the process by application of acoustic emission measurements.

Acoustic emission signals tell much about the machining process. It is generated through high frequent impacts on solid materials that are the origin of transient elastic waves through the material. For example, in cutting the workpiece is subject to lots of these waves. With sufficient knowledge about the acoustic waves, wear of the curring edges can be monitored indirectly. In EDM, the acoustic emission signals have been proven to comprehend information about energy dissipated from electrical discharges during the process.

In your thesis you will design, execute and analyze experiments about the acoustic emission during EDM of titanium alloys. You will give insight into the energy partition during the machining operation. This will give rise to an enhanced unterstanding about the challenging machinability of titanium alloys by EDM.

Please feel free to contact me at any time to discuss the topic more specifically.
With sufficient success during the thesis we can talk about opportunities to participate as a HiWi in our department.
- Student of material science or mechanical engineering or similar
Time required: 200,00 Hours

Your contact:
Maximilian Holsten, M.Sc. RWTH
Herwart-Opitz-Haus 54A 302D
Tel.: +49 241 80-28037
Fax: +49 241 80-22293
Mail: M.Holsten@wzl.rwth-aachen.de