Ultrasonic measurement of closed stress corrosion crack depth using subharmonic phased array

Yoshikazu Ohara, Hiroaki Endo, Tsuyoshi Mihara, Kazushi Yamanaka

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

We formed a stress corrosion crack (SCC) more than 10mm deep to simulate those generated in atomic power plants. We precisely imaged the formed SCC by a novel imaging method, namely, the subharmonic phased array for crack evaluation (SPACE), and found that it had complex branches. Subsequently, we cut the specimen for the optical observation of the cross sections, and discussed the origin of the SCC extension on the basis of the optical microscopic observation of the cross sections. To examine the open and closed parts of crack in the optical images, we superposed the crack extracted from the optical images onto the SPACE images. We compared the optically and SPACE-measured crack depths, and demonstrated that SPACE is useful in reducing the underestimation of closed-crack depths.

Original languageEnglish
Article number07GD01
JournalJapanese journal of applied physics
Volume48
Issue number7 PART 2
DOIs
Publication statusPublished - 2009 Jul 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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