Depth sizing of partial-contact stress corrosion cracks from ECT signals

Weiying Cheng, Shigeru Kanemoto, Ichiro Komura, Mitsuharu Shiwa

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

A partial-contact stress corrosion crack (SCC) is electrically modeled as a crack region with non-zero conductivity in eddy current testing (ECT). This partial-contact effect is excluded by an optimally designed crack-conductivity-insensitive depth characterization signal function (DCSF), and consequently the master curves obtained from electric-discharge machining (EDM) notches can be utilized directly in the depth sizing of SCCs. Furthermore, a crack conductivity independent artificial neural network (ANN) is constructed so that the entire depth profile can be reconstructed regardless of the crack conductivity. These two approaches are numerically validated and applied to the characterization of SCCs in SUS304 from measurement ECT signals. The average depth of each SCC is fast estimated from the DCSF, and the detailed depth profile is reconstructed from ANN. The ECT depth-sizing results show reasonable agreement with UT-TOFD measurement.

Original languageEnglish
Pages (from-to)374-383
Number of pages10
JournalNDT and E International
Volume39
Issue number5
DOIs
Publication statusPublished - 2006 Jul 1
Externally publishedYes

Keywords

  • Crack profile
  • Depth sizing
  • Eddy current testing
  • Stress corrosion crack
  • artificial neural network

ASJC Scopus subject areas

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

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