Measurement of flat samples with rough surfaces by magnetic adaptive testing

Ivan Tomás, Jana Kadlecová, Gábor Vértesy

Research output: Contribution to journalArticle

15 Citations (Scopus)


Magnetic nondestructive tests of structural degradation of ferromagnetic construction materials must be often carried out on flat samples whose magnetic circuit is artificially closed by an attached soft magnetic yoke. Quality of magnetic contact between the sample surface and faces of the yoke has a strong influence on the measured signal, and especially with unpolished surfaces, it is difficult to be reproduced. The presented experiment suggests a partial solution of the problem via application of nonmagnetic spacers inserted between the sample and the yoke. The spacers distort and decrease the signal, but they also decrease fluctuation of the magnetic contact quality and smooth scatter of the measured data. As the goal of the nondestructive test is not absolute measurement of magnetic parameters of the material, but relative comparison of some convenient magnetic features, which relate to degradation of microstructure of the sample, application of the spacers proves to be not only acceptable, but it is very helpful.

Original languageEnglish
Article number6172394
Pages (from-to)1441-1444
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number4
Publication statusPublished - Apr 1 2012



  • Magnetic adaptive testing
  • magnetic NDE
  • magnetic contact
  • magnetically open samples

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this