Nondestructive magnetic measurement methods can be successfully applied to determine the embrittlement of nuclear pressure vessel steel caused by neutron irradiation. It was found in previous works that reasonable correlation could be obtained between the nondestructively measured magnetic parameters and destructively determined ductile-to-brittle transition temperature. However, a large scatter of the measurement points was detected even in the cases of the non-irradiated reference samples. The reason for their scattering was attributed to the local inhomogeneity of material. This conclusion is verified in the present work by applying three different magnetic methods on two sets of Charpy samples made of two different reactor steel materials. It was found that by an optimal magnetic pre-selection of samples, a good, linear correlation can be found between magnetic parameters as well as the ductile-to-brittle transition temperature with low scattering of points. This result shows that neutron irradiation embrittlement depends very much on the local material properties.
Bibliographical noteFunding Information:
Funding: This research was carried out in frame of the “NOMAD” project. This project (Nondestructive Evaluation System for the Inspection of Operation-Induced Material Degradation in Nuclear Power Plants) has received funding from the Euratom research and training programme 2014–2018 under grant agreement No 755330.
This research was carried out in frame of the ?NOMAD? project. This project (Non-destructive Evaluation System for the Inspection of Operation-Induced Material Degradation in Nuclear Power Plants) has received funding from the Euratom research and training programme 2014?2018 under grant agreement No 755330.
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
- Barkhausen noise measurement
- Ductile to brittle transition temperature
- Magnetic adaptive testing
- Magnetic nondestructive evaluation
- Micromagnetic multiparameter microstructure and stress analysis 3MA
- Neutron irradiation embrit-tlement
- Reactor pressure vessel
- Steel degradation
- Neutron Irradiation Embrittlement
- Barkhausen Noise Measurement
- Magnetic Adaptive Testing
- Micromagnetic Multiparameter Microstructure And Stress Analysis 3ma
- Reactor Pressure Vessel
- Ductile To Brittle Transition Temperature
- Magnetic Nondestructive Evaluation
- Steel Degradation
ASJC Scopus subject areas
- Condensed Matter Physics
- Materials Science(all)