Formation and evaluation of closed stress corrosion cracks in ni-based alloy weld metal for nuclear power plants

Yoshikazu Ohara, Yohei Shintaku, Satoshi Horinouchi, Kazushi Yamanak

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Closed stress corrosion cracks (SCCs) have been generated in nuclear power plants, resulting in the underestimationand nondetection. To solve this problem, we have developed closed-crack imaging method, the subharmonic phased array forcrack evaluation (SPACE), on the basis of subharmonic waves and phased array technique. Here, after verifying the SPACE in a realistic SCC specimen, we present a two-step method for forming deep closed SCC for a reasonable amount of time. The SCC closure was verified by SPACE. This significantly contributes to the improvement of nondestructive evaluation methods and training/educating of inspection engineers.

Original languageEnglish
Title of host publicationNonlinear Acoustics
Subtitle of host publicationState-of-the-Art and Perspectives, ISNA 2012 - 19th International Symposium on Nonlinear Acoustics
Pages183-186
Number of pages4
Edition1
DOIs
Publication statusPublished - 2012 May 1

Publication series

NameAIP Conference Proceedings
Number1
Volume1474
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Keywords

  • Closed stress corrosion cracks
  • Imaging
  • Phased array.
  • Subharmonic waves

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Ohara, Y., Shintaku, Y., Horinouchi, S., & Yamanak, K. (2012). Formation and evaluation of closed stress corrosion cracks in ni-based alloy weld metal for nuclear power plants. In Nonlinear Acoustics: State-of-the-Art and Perspectives, ISNA 2012 - 19th International Symposium on Nonlinear Acoustics (1 ed., pp. 183-186). (AIP Conference Proceedings; Vol. 1474, No. 1). https://doi.org/10.1063/1.4749327