Institute of Materials Science and Engineering

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

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