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 language | English |
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Pages (from-to) | 81-88 |
Number of pages | 8 |
Journal | Corrosion Science |
Volume | 57 |
DOIs | |
Publication status | Published - 2012 Apr |
Keywords
- A. Superalloys
- B. SEM
- C. Stress corrosion
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)
- Materials Science(all)