Early detection of damage to thermocyclically stressed austenitic materials – monitoring methods for aging management
The aim of the project was to develop new sensor systems, the signals of which could be used to detect and interpret fatigue-related microstructural changes that arise prior to crack formation. The research involved inducing microstructural changes by cyclic thermo-elastic/plastic and mechanical loads in austenitic-steel pipelines.
Electro-magnetic ultrasonic sensors (EMUS) used for fatigue testing (left) and graphic representation of relationship between stress-strain and propagation-strain (right)
The research was carried out as part of a project funded by the Federal Ministry of Economic Affairs and Energy (BMWi) in cooperation with the Fraunhofer Institute for Non-Destructive Testing (IZFP) in Saarbrücken.
publications
I. Altpeter, R. Tschuncky, K. Hällen, G. Dobmann, Ch. Boller, A. Sorich, M. Smaga, D. Eifler: Early detection
of damage in thermo-cyclically loaded austenitic materials
IOS Press: Studies in Applied Electromagnetics and Mechanics (2012)
A. Sorich, M. Smaga, D. Eifler: Fatigue monitoring of austenitic steels with electromagnetic acoustic
transducers
Materials Performance and Characterization (2014), https://doi.org/10.1520/MPC20140017