Analytical transmission electron microscopy study of grain boundary precipitates in an Fe-Ni-Mn maraging alloy

S. Hossein Nedjad, M. Nili Ahmadabadi, R. Mahmudi, Tadashi Furuhara, T. Maki

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Field-emission gun analytical transmission electron microscopy was used to study grain boundary precipitates in Fe-10Ni-7Mn (wt.%) maraging alloy after isothermal aging at 753 K. High spatial resolution energy dispersive X-ray spectroscopy was used for quantitative chemical analysis of the grain boundary precipitates. Precipitation of f.c.t. θ-NiMn intermetallic compound and reversion to f.c.c. austenite were identified at prior austenite grain boundaries after prolonged aging. Selected area electron diffraction patterns (SADPs) showed the L10 type ordering of f.c.t. θ-NiMn precipitates. The f.c.t. θ-NiMn precipitates showed higher Ni and Mn concentrations than reverted f.c.c. austenite.

Original languageEnglish
Pages (from-to)288-291
Number of pages4
JournalMaterials Science and Engineering A
Volume438-440
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2006 Nov 25

Keywords

  • Grain boundary
  • Maraging
  • NiMn
  • Precipitation
  • Reverted austenite

ASJC Scopus subject areas

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

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