Fatigue damage monitoring of round shape specimen by acoustic microscopy

Tsuyoshi Mihara, Gaku Suzuki, Akira Harazono, Takeshi Ikuno

Research output: Contribution to journalArticlepeer-review


Acoustic microscope can detect microstructural features with high resolving power compared to other lower frequency acoustic techniques. Many non-destructive evaluations using acoustic microscope, several of them used in industrial fields, were investigated. However, acoustic measurement of curved surface structure was restricted to basic studies as conventional acoustic microscope system was designed for flat specimen. We have developed a modified acoustic microscope for curved surface specimen testing and have measured acoustic image of round bar specimen. In this study, using this system, velocities of round bar specimen during fatigue test are monitored using the V(z) curve method. Measurement errors depending on curved surface measurement were investigated and it was found that the acoustic velocity tends to increase as fatigue damage increases.

Original languageEnglish
Pages (from-to)161-166
Number of pages6
JournalNDT and E International
Issue number3
Publication statusPublished - 1999 Apr


  • Acoustic microscopy
  • Curved surface
  • Fatigue damage
  • Velocity measurement

ASJC Scopus subject areas

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


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