Effect of chemical composition on grain boundary microchemistry and stress corrosion cracking in Alloy 182

Qunjia Peng, Juan Hou, Yoichi Takeda, Tetsuo Shoji

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Effects of chemical composition on grain boundary microchemistry and stress corrosion cracking (SCC) in two kinds of modified Alloy 182 with different hot-cracking resistance were investigated. The results showed that while decreasing concentrations of C, P and S but increasing the concentration ratio of (Nb. +. Ta)/Si can enhance hot-cracking resistance of the alloy, SCC susceptibility in primary water was promoted simultaneously, which is most likely due to the lowered creep resistance by a lower precipitate density and less P segregation at the grain boundary in the alloy.

Original languageEnglish
Pages (from-to)91-99
Number of pages9
JournalCorrosion Science
Volume67
DOIs
Publication statusPublished - 2013 Feb 1

Keywords

  • A. Superalloys
  • B. AES
  • C. Stress corrosion
  • C. Welding

ASJC Scopus subject areas

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

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