Inspection of reactor steel degradation by magnetic adaptive testing

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  • HAS - Hungarian Academy of Science

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Degradation of nuclear pressure vessel steel materials, 15Kh2NMFA type and A508 Cl2 type (definition is given in the text) were investigated by a novel magnetic nondestructive testing method, so-called Magnetic Adaptive Testing (MAT), which is based on systematic measurement and evaluation of minor magnetic hysteresis loops. The measured samples were thermally treated by a special step cooling procedure, which generated structural changes in the material. It was found that this type of degradation can be easily followed by magnetic measurements. Charpy impact test were also performed and the results were compared with the magnetic parameters. In case of 15Kh2NMFA steel, a good, reliable and closely linear correlation was found between magnetic descriptors and transition temperature.


Original languageEnglish
Article number963
Number of pages12
Issue number6
Publication statusPublished - 22 Mar 2019


  • steel degradation, nuclear reactor pressure vessel, magnetic nondestructive evaluation, magnetic adaptive testing

ID: 5034746