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Master thesis
Evaluation of additive manufacturing processes for the repair of turbomachinery components from nickel-based
super alloys
Motivation Direct Metal Deposition (DMD) is a further development of laser deposition welding to create 3 dimensional struc-
tures. During this additive manufacturing process metal powder particles are blown and melted into a melt pool
which is created by the laser such that layer by layer are generated to obtain a volumetric structure. In the indus-
try this manufacturing process is used for example for the repair of turbine blades.
The application of DMD is especially economic for materials that are difficult to machine. This is the case for ex-
ample for nickel-based super alloys which are used mainly for high temperature applications such as tur-
bomachinery components. To work with such materials at the 5 axis laser deposition center of the IWF it is re-
quired to find appropriate process parameters to ensure a good part quality. Additionally it is required to further
develop the deposition strategy to be able to repair turbomachinery components. This parameter optimization and
development of a deposition strategy for repair processes is to be performed during the master thesis.
DMD-processing head DMD process principle
Task description - literature research - design of experiments - sample production - experiment evaluation - documentation and presentation of the results
Requirements
- Interest in experimental work - Independent working style
Duration / begin - Duration: 6 months - Begin: flexible
Contact Fabian Soffel, ETH Zürich, 044 633 08 49 [email protected] Daniel Eisenbarth, inspire AG 044 633 79 56 [email protected]