Precipitation of σ-phase in high-nitrogen austenitic 18Cr-18Mn-2Mo-0.9N stainless steel during isothermal aging

Tae Ho Lee, Chang Seok Oh, Chang Gil Lee, Sung Joon Kim, Setsuo Takaki

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

Precipitation mechanism of σ-phase in austenitic high-nitrogen steel (HNS) upon aging was investigated using electron microscopy and thermodynamic calculation. The precipitation sequence was found to be grain boundary Cr 2N, cellular Cr2N and σ-phase with aging time. It was concluded that the nitrogen-depleted zone near Cr2N induces the nucleation of σ-phase.

Original languageEnglish
Pages (from-to)1325-1328
Number of pages4
JournalScripta Materialia
Volume50
Issue number10
DOIs
Publication statusPublished - May 1 2004

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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