Abstract
Stress corrosion cracking (SCC) in the fusion boundary (FB) region of an Alloy 182-low alloy steel (LAS) dissimilar weld joint in 288 °C water was investigated by experiments and finite element simulation. Creviced bent beam and crack growth rate (CGR) experiments showed that, while the FB was a barrier to SCC growth, further crack growth into LAS was activated by a combined effect of sulfate and dissolved oxygen in water. Finite element simulation suggested that a positive gradient of hardness as the crack approached to the FB in dilution zone caused decreased CGR. Role of microstructure and water chemistry in SCC was discussed.
Original language | English |
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Pages (from-to) | 4309-4317 |
Number of pages | 9 |
Journal | Corrosion Science |
Volume | 53 |
Issue number | 12 |
DOIs | |
Publication status | Published - 2011 Dec 1 |
Keywords
- A. Alloy
- A. Low alloy steel
- B. SEM
- B. TEM
- C. Stress corrosion
- C. Welding
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)
- Materials Science(all)