Microstructure and stress corrosion cracking of the fusion boundary region in an alloy 182-A533B low alloy steel dissimilar weld joint

Juan Hou, Qunjia Peng, Yoichi Takeda, Jiro Kuniya, Tetsuo Shoji

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

Stress corrosion cracking (SCC) in the fusion boundary (FB) region of an Alloy 182-A533B low alloy steel (LAS) dissimilar weld joint in high temperature water doped with sulfate was studied following a microstructure characterization of the FB region. The microstructure characterization suggested the type-II and type-I boundaries in the dilution zone (DZ) adjacent to the FB had lower resistance to SCC growth than the FB. Crack propagating perpendicular to the FB in the DZ was observed to be blunted by pitting at the FB, followed by the reactivation from the pitting by localized oxidation along the grain boundary in LAS.

Original languageEnglish
Pages (from-to)3949-3954
Number of pages6
JournalCorrosion Science
Volume52
Issue number12
DOIs
Publication statusPublished - 2010 Dec 1

Keywords

  • A. Dissimilar weld joint
  • C. Fusion boundary
  • C. High temperature oxygenated water
  • C. Microstructure
  • C. Stress corrosion cracking
  • C. Type-II boundary

ASJC Scopus subject areas

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

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