Investigation on effect of distance between two collinear circumferential surface cracks on primary water stress corrosion crack growth in alloy 600TT steam generator tubes

Eun Ju Heo, Jong Sung Kim, Jun Young Jeon, Yun Jae Kim

Research output: Contribution to journalArticlepeer-review

Abstract

The study investigated the effect of the distance between two collinear circumferential surface cracks on the primary stress corrosion crack (PWSCC) growth in alloy 600TT steam generator tubes using a finite element damage analysis based on the PWSCC initiation model and macroscopic phenomenological damage mechanics approach. The damage analysis method was verified by comparing the results to the previous study results. The verified method was applied to collinear circumferential surface PWSCCs. As a result, it was found that the collinear cracks showed earlier coalescence and penetration times than the a single crack, and the times increased with the distance. In addition, it is expected that penetration may occur before coalescence of two cracks if they are more than a specific distance apart.

Original languageEnglish
Pages (from-to)269-273
Number of pages5
JournalTransactions of the Korean Society of Mechanical Engineers, A
Volume39
Issue number3
DOIs
Publication statusPublished - 2015 Jan 1
Externally publishedYes

Keywords

  • Alloy 600TT
  • Collinear Circumferential Surface PWSCC
  • Damage Mechanics
  • Finite Element Analysis
  • Growth Behavior
  • PWSCC Initiation Model
  • Steam Generator Tubes

ASJC Scopus subject areas

  • Mechanical Engineering

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