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  4. Micromagnetic Microstructure- and Stress-Independent Materials Characterization in Reactor Safety Research
 
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2021
Journal Article
Title

Micromagnetic Microstructure- and Stress-Independent Materials Characterization in Reactor Safety Research

Abstract
Reactor safety research aims at the safe operation of nuclear power plants during their service life. In this respect, Fraunhofer IZFP's micromagnetic multiparameter, microstructure, and stress analysis (3MA) has already made a significant contribution to the understanding of different aging mechanisms of component materials and their characterization. The basis of 3MA is the fact that microstructure and mechanical stress determine both the mechanical and magnetic material behavior. The correlation between features of magnetic and mechanical material behavior enables the micromagnetic prediction of mechanical properties and stress, both of which can decisively influence the service life. The Federal Ministry for Economic Affairs and Energy (BMWi) funded this research, handling the mutually superimposed microstructural and stress-dependent influences, a substantial challenge, especially under practical conditions. This superposition leads to ambiguities in the micromagnetic features. The 3MA testing system has been extended by more sophisticated evaluation methods being able to cope with more complex datasets. Investigations dealing with the expansion of the feature extraction and machine learning methods have led to a more precise distinction between microstructural and stress-dependent influences. This approach provides the basis for future applications in reactor safety.
Author(s)
Zimmer, Cyrill
Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP  
Rallabandi, Yashashwini Nikhitha
Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP  
Szielasko, Klaus  
Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP  
Eichheimer, Christian
Fraunhofer-Institut für Werkstoffmechanik IWM  
Luke, Michael  
Fraunhofer-Institut für Werkstoffmechanik IWM  
Youssef, Sargon  
Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP  
Journal
Materials  
Funder
Bundesministerium für Wirtschaft und Energie BMWi (Deutschland)  
Open Access
DOI
10.3390/ma14185258
Additional full text version
Landing Page
Language
English
Fraunhofer-Institut für Werkstoffmechanik IWM  
Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP  
Keyword(s)
  • 3MA

  • micromagnetic materials characterization

  • machine learning

  • NDE

  • NDT

  • reactor safety research

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