DED for Repair and Manufacture of Turbomachinery Components

Direct energy deposition (DED) is well known for its suitability for repair applications. This chapter describes the main process steps of two exemplary DED process chains for turbomachinery use cases. In the field of turbomachinery maintenance and new component production additive manufacturing technologies, such as DED, contribute to a flexible and profitable production of small batch sizes. The chapter explains the steps of an exemplary process chain for the repair of a turbine blade platform: machining & preparation, reverse engineering, generation of tool paths, DED process and adaptive machining. DED based hybrid additive manufacturing of new components is mainly motivated either by an increase of productivity or by an increase of component value. The exemplary component in the process chain is a turbocharger nozzle ring. The nozzle ring is used for turbochargers of diesel and gas engines in the 400–3,300 kW power range.

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