Analysis of surface roughness influence in non-destructive magnetic measurements applied to reactor pressure vessel steels

Research output: Contribution to journalArticlepeer-review


  • Gábor Vértesy
  • Antal Gasparics
  • James M; Griffin
  • Jino Mathew
  • Michael E. Fitpatrick
  • Inge Uytdenhouwen

Institutes & Expert groups

  • Coventry University - Institute for Future Transport and Cities
  • HAS - Hungarian Academy of Science

Documents & links



The influence of surface roughness on magnetic measurements of Reactor Pressure Vessel Steels was investigated by applying two types of magnetic, non-destructive measurement on nuclear reactor pressure vessel steel samples: magnetic adaptive testing (MAT) and magnetic Barkhausen noise measurement (MBN). The surface roughness was modified by primary and secondary machine cutting forces. Different settings of machine cutting produced different surface conditions. It was found that for both measurements a monotonic correlation was found to exist between magnetic parameters and surface roughness. Results of the MAT measurements found that the correlation depends on the speed (i.e., on the applied slew rate) of the magnetizing current. In a similar fashion, results from the MBN method show good agreement with MAT, where the response diminishes with an increase in surface roughness. The results show the importance of accounting for surface condition in the interpretation of results of non-destructive magnetic testing.


Original languageEnglish
Article number8938
Pages (from-to)1-11
Number of pages11
JournalApplied Sciences
Issue number24
Publication statusPublished - 15 Dec 2020


  • Magnetic nondestructive evaluation, Magnetic adaptive testing, Magnetic Barkhausen noise measurement, Steel degradation, Surface roughness

ID: 6994880