Fraunhofer ISC, Center for High Temperature Materials and Design HTL, Bayreuth
Fraunhofer ISC, Center for High Temperature Materials and Design HTL, Bayreuth

Currently funded project

Materials and construction methods for robust turbine design (Wero_Turb)

Motivation

Work packages and cooperation between the HTL and the project partners
© Fraunhofer-Centre HTL
Work packages and cooperation between the HTL and the project partners

Environmentally friendly aviation requires reliable aircraft engines with high efficiency, low weight and a long service life. Turbine components made from new materials must be designed so robustly that they exhibit improved properties over the entire life cycle. For future low-pressure turbines (LPTs) subject to higher thermal loads, design concepts for guide stages in SiC/SiC-CMC construction are being developed and their impact behaviour investigated.

 

 

Objectives

Crack propagation in a CMC material during increasing mechanical bending load measured by in-situ computed tomography
© Fraunhofer-Centre HTL
Crack propagation in a CMC material during increasing mechanical bending load measured by in-situ computed tomography
3D representation of phase components in a CMC composite structure
© Fraunhofer-Centre HTL
3D representation of phase components in a CMC composite structure

Within the framework of the project, methods for defect detection are being developed at the Fraunhofer-Centre HTL and measurements are being carried out on impact samples. The main objective is to develop a procedure based on computer tomography that can be used to detect the damage and material changes in SiC/SiC samples caused by impact. In particular, the damage caused by the foreign body impact and its local distribution are intended to be recorded and evaluated. The microstructures will be described as a function of the impact.

 

Approach

Material structure of a SiC/SiC composite with coated SiC fibres embedded in a fine-scale SiSiC matrix
© Fraunhofer-Centre HTL
Material structure of a SiC/SiC composite with coated SiC fibres embedded in a fine-scale SiSiC matrix
  •  Application of sliding or protective coatings on SiC fibres
  • Selection of methods for defect detection before and after impact
  • Development of special algorithms for optimal crack detection using computed tomography
  • Examination of impact samples before and after impact tests
  • Performing volumetric scans on flat and curved targets
  • High-resolution detection of microstructures and defects

 

Project Data

Project Duration
 01.09.2020 - 30.08.2023
Sponsor
 Federal Ministry of Economic Affairs and Energy
Funding Amount
 190,000 Euro

Project Partners





 

Frauhofer HTL

Fraunhofer IWM

MTU Areo Engines AG

German Aerospace Centre (DLR)

Schunk GmbH
Project Coordination MTU Aero Engines AG
Project Management at the HTL Dr. Jens Schmidt