The detection of defects in paramagnetic materials using locally focused electromagnetic field technique

Hoon Kim, Tetsuo Shoji

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

We propose a new nondestructive testing technique by means of electromagnetic field detection focusing on a local volume. The technique consists of an induction wire and an electromagnetic detecting sensor and is a non-contact method in application. In this study, the developed technique was applied to the evaluation of EDM slits and fatigue crack in some paramagnetic metals and investigated the influence for some lift-off and the change of the measured voltages for the depth of defects. The measured voltage signal in the vicinity of defects changes, and the magnitude of the peak voltage for each defect varies with the depth of defect.

Original languageEnglish
Pages (from-to)625-629
Number of pages5
JournalKey Engineering Materials
Volume270-273
Issue numberI
DOIs
Publication statusPublished - 2004
Externally publishedYes
EventProceedings of the 11th Asian Pacific Conference on Nondestructive Testing - Jeju Island, Korea, Republic of
Duration: 2003 Nov 32003 Nov 7

Keywords

  • Electromagnetic field
  • Induction wire
  • Lift-off
  • Non-contact
  • Paramagnetic metal

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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