Role of water chemistry and microstructure in stress corrosion cracking in the fusion boundary region of an Alloy 182-A533B low alloy steel dissimilar weld joint in high temperature water

Qunjia Peng, He Xue, Juan Hou, Kazuhiko Sakaguchi, Yoichi Takeda, Jiro Kuniya, Tetsuo Shoji

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

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 languageEnglish
Pages (from-to)4309-4317
Number of pages9
JournalCorrosion Science
Volume53
Issue number12
DOIs
Publication statusPublished - 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)

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