Investigation of the role of a nonmagnetic spacer in local wall thinning inspection

0510458 - FZÚ 2020 RIV NL eng J - Journal Article
Vértesy, G. - Tomáš, Ivan - Bálint, B. - Gyimothy, Sz. - Pávó, J. - Uchimoto, T. - Takagi, T.
Investigation of the role of a nonmagnetic spacer in local wall thinning inspection.
International Journal of Applied Electromagnetics and Mechanics. Roč. 57, č. 2 (2018), s. 235-245. ISSN 1383-5416. E-ISSN 1875-8800
R&D Projects: GA ČR GB14-36566G
Institutional support: RVO:68378271
Keywords : pipe * feasibility * plates * local wall thinning * magnetic NDT * magnetic adaptive testing * nonmagnetic spacer
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 0.684, year: 2018
Method of publishing: Limited access
https://doi.org/10.3233/jae-180002

Detectability of an artificial slot, placed at the bottom of a steel plate was investigated by the method of Magnetic adaptive testing (MAT), when the measurement was performed through another steel plate. Influence of an air gap (or of a nonmagnetic spacer) located either between the magnetizing yoke and the top plate surface or between the two plates was explored. It was found that if the thickness of the nonmagnetic spacer was not larger than 0.15 mm, it had no influence on the detectability of the slot in the given geometry. This result shows an excellent applicability of MAT, and it is encouraging for possible future practical applications. The empirical data were compared with results of an electromagnetic simulation, and the outcome was interpreted and explained.
Permanent Link: http://hdl.handle.net/11104/0300933