Nondestructive Testing of Back-Side Local Wall-Thinning by Means of Low Strength Magnetization and Highly Sensitive Magneto-Impedance Sensors

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A nondestructive testing method is presented for inspection and evaluation of back-side local thinning in ferromagnetic structures. It is shown that the change of initial magnetic leakage reluctivity is correlated with a local thinning's reduced thickness and thinning area; a thinning's transversal length is more significant than the longitudinal length in terms of thinning area. The faint magnetic flux leakage excited from back-side local thinning can be detected by highly sensitive magneto-impedance sensors. Validation tests were carried out by moving a probe over a local thinning in the transversal and longitudinal directions, respectively. Results show the feasibility of inspecting and evaluating back-side local thinning by using small magnetization force and highly sensitive magneto-impedance sensors.

Original languageEnglish
Article number7469299
Pages (from-to)5548-5556
Number of pages9
JournalIEEE Sensors Journal
Volume16
Issue number14
DOIs
Publication statusPublished - 2016 Jul 15
Externally publishedYes

Keywords

  • magnetic circuits
  • magnetic field measurement
  • magnetic flux leakage
  • magnetic sensors
  • nondestructive testing
  • numerical simulation
  • thickness measurement
  • wall-thinning

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

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