A magnetic flux leakage method using a magnetoresistive sensor for nondestructive evaluation of spot welds

Keiji Tsukada, Mitsuteru Yoshioka, Toshihiko Kiwa, Yoshinobu Hirano

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Spot welding is widely used for joining metal plates. However, a highly reliable monitoring method is needed to weld a robust structure. For this purpose, we developed a magnetic flux leakage (MFL) system using a magnetoresistive (MR) sensor for nondestructive spot-weld inspection. The magnetic flux is induced between two joined plates, and the magnetic flux leakage with a tangential component parallel to the plate surface is measured. A magnetic image at the spot-welding part is obtained by two-dimensional scanning. The connected diameter of the nugget and the maximum shear load are measured after the magnetic measurement to investigate their interrelationship. The results show that the nondestructive magnetic flux leakage test shows a good correlation with the destructive shear test.

Original languageEnglish
Pages (from-to)101-105
Number of pages5
JournalNDT and E International
Volume44
Issue number1
DOIs
Publication statusPublished - Jan 2011

Fingerprint

spot welds
Magnetic flux
magnetic flux
Welds
leakage
Spot welding
evaluation
sensors
Sensors
welding
shear
Plate metal
metal plates
Magnetic variables measurement
Joining
magnetic measurement
inspection
Inspection
Scanning
scanning

Keywords

  • Magnetic flux leakage
  • Magnetoresistive sensor
  • Spot welding

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

A magnetic flux leakage method using a magnetoresistive sensor for nondestructive evaluation of spot welds. / Tsukada, Keiji; Yoshioka, Mitsuteru; Kiwa, Toshihiko; Hirano, Yoshinobu.

In: NDT and E International, Vol. 44, No. 1, 01.2011, p. 101-105.

Research output: Contribution to journalArticle

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