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

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

    Research outputpeer-review


    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
    StatePublished - 15 Dec 2020

    Cite this