A method for sizing small fatigue cracks in stainless steel using microwaves

Masumi Saka, Yang Ju, Daying Luo, Hiroyuki Abé

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

To evaluate the depth of small fatigue cracks under conditions of no contact and without using any coupling medium, a novel microwave technique was demonstrated. An open-ended coaxial line sensor was used to increase the spatial resolution and the ratio of signal to noise. Closed fatigue cracks were detected successfully and a W - shaped characteristics signal was obtained. A dual frequency technique was proposed to evaluate the depth of small fatigue cracks for which crack closure characteristics were unknown. The evaluated results are shown to agree well with the actual values.

Original languageEnglish
Pages (from-to)573-578
Number of pages6
JournalJSME International Journal, Series A: Solid Mechanics and Material Engineering
Volume45
Issue number4
DOIs
Publication statusPublished - 2002 Oct 1

Keywords

  • Coaxial line sensor
  • Crack closure
  • Crack depth
  • Fatigue crack
  • Microwave
  • Nondestructive evaluation

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanical Engineering

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