Field Topography of Defects in Magnetic Non-Destructive Testing

Aleksey Pokrovskiy; Ilya Novikov; Andrey Khvostov

doi:doi:10.12737/23510

Field Topography of Defects in Magnetic Non-Destructive Testing

Published в NDT World · Volume 19, Issue 4, 2015 · Pages 53–56 · Rubrics: Magnetic Inspection

DOI 10.12737/23510

Received: 14.12.2016 Accepted: 14.12.2016 Published: 14.12.2016 Language of publication: RUS

Authors

Aleksey Pokrovskiy · Ilya Novikov · Andrey Khvostov

ABSTRACT

The defect parameters can be evaluated by defect induced magnetic field topography using Hall sensor. Investigations were carried out on specially prepared samples with artificial defects. According to calculations and tests tangential component of magnetic field strength extremes were detected values on either side of the defect in the surface layer l only. But this effect can not be detected by Hall sensors or Foerster probes due to their sizes. The normal component of the magnetic field strength provides a sufficiently accurate determination of the fault location, where this component becomes zero between the two extreme values located quite close to each other. The results of the study showed that at distances available to Hall transducers one can confine to the experimental research, whereas computational methods shall be used to study the topography of field defects at very small distances from the surface. This could open the prospects for testing at small distances from the surface of the object.

KEYWORDS

flux density magnetic-field strength magnetic-field topography

Information References

Authors:

Type:

Article

Pages:

from 53 to 56

Status:

Published

Language:

Russian

Keywords:

flux density, magnetic-field strength, magnetic-field topography

References

1. Defektoskop stalnykh kanatov INTROS [Steel-wire rope flaw detector INTROS]. Mos-cow, Intron+, p.16, (in Russ.). Available http://www.intron.ru/static/photos/INTROS/Intron_buklet_2014-5_prew.pdf.

2. Magnitnyy defektoskop INTROKOR M-150T [ Magnetic tester INTROKOR M-150T] Moscow, Intron+, p.16, (in Russ.). Available http://www.intron.ru/static/photos/INTROCOR/INTROKOR_%D0%A2.pdf

3. Pashagin A.I., Benklevskaya N.P. Nonuniform magnetization of an article around a flaw during magnetic inspection. Russian J. Nondestructive Testing. 2007, no.5, pp. 310-315.

4. Slesarev L.A., Barat V.A., Chobanu P.M. A decrease in the error of the statistical meth-od for estimating the parameters of flaws in magnetic flaw detection. Russian J. Non-destructive Testing. 2012, no.1, pp. 55-58.

5. Pashagin A.I., Shcherbinin V.E. Indication of magnetic fields with the use of galvanic currents in magnetic-powder nondestructive testing. Russian J. Nondestructive Testing. 2012, no.9, pp. 528-531.

6. Putnikov Yu.G. Magnitnyy skaner-defektoskop novogo pokoleniya [New generation magnetic scanner - flaw detector]. Conference “Gas transmission companies working results forJSC Gazprom cross-country gas and gas condensate pipeline”. Minsk, 2015 (in Russ.).

7. Mamaev A.V., Meleshko N.V., Pokrovskiy A.D. at al. Matrichnyy magnitnyy preobrazovatel v defektoskopii [Magnetic array sensor for NDT]. Matereialy XVII rossiyskoy nauchno-tekhnicheskoy konferentsii “nerazrudhayushchiy control i diagnostika” [XVII Russian scientific and technological conference “Nondestructive testing and diagnostics”]. Ekaterinnurg, UrO RAN. 2005 (in Russ.).

Доступ и загрузка

🗂 JATS XML ❝ To cite 📎 Citations

—

Views

—

Downloads

Citations

Индексируется в

Field Topography of Defects in Magnetic Non-Destructive Testing

Confirmation

Регистрация