Evaluation of sensitivity of remote field eddy current testing and low-frequency eddy current testing for inspecting grooves of metal plate

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6 Citations (Scopus)

Abstract

We compare remote field eddy current testing and low-frequency eddy current testing from the viewpoint of sensitivity to back-side grooves in a metal plate. We carry out experiments using three metal plates with different depths of artificial grooves. A U-shape magnetic shield gives rise to a remote field eddy current as occurs in pipe inspection. The experiments show that the two methods have almost the same sensitivity to back-side grooves if a relatively low frequency and relatively far coil interval are used, which is also validated by three-dimensional finite-element simulations. We conduct numerical investigations to find the reason for this condition.

Original languageEnglish
Pages (from-to)90-95
Number of pages6
JournalMaterials Transactions
Volume54
Issue number1
DOIs
Publication statusPublished - 2013

Keywords

  • Depth of penetration
  • Eddy currents
  • Electromagnetic nondestructive evaluation
  • Finite element simulation
  • Metal plate
  • Sensitivity

ASJC Scopus subject areas

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

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