Environmentally assisted crack growth in one-dimensionally cold worked Alloy 690TT in primary water

Q. J. Peng, J. Hou, Toshio Yonezawa, T. Shoji, Z. M. Zhang, F. Huang, E. H. Han, W. Ke

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

Environmentally assisted crack growth in thermally treated Alloy 690 cold worked one-dimensionally to the thickness reduction of 25% in primary water was investigated. In the water at 50°C and dissolved hydrogen (DH) of 2.7-2.9ppm, the alloy showed a crack growth rate of <2.2×10 -9mm/s at a stress intensity factor of 35MPa√m. In the water at 340°C, stress corrosion crack growth rate of <1×10 -8mm/s was observed in the alloy over a DH range of 0.37-2.6ppm. Further, it was found that hydrogen could promote SCC growth when increasing DH from a very low level.

Original languageEnglish
Pages (from-to)81-88
Number of pages8
JournalCorrosion Science
Volume57
DOIs
Publication statusPublished - 2012 Apr

Keywords

  • A. Superalloys
  • B. SEM
  • C. Stress corrosion

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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