Characterization of β′ precipitate phase in Mg-2at% y alloy aged to peak hardness condition by high-angle annular detector dark-field scanning transmission electron microscopy (HAADF-STEM)

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Abstract

The β′ phase precipitated in an Mg-2 at%Y (Mg98Y 2) alloy aged to a peak hardness condition at 200°C for 336 h has been studied by high-angle annular detector dark-field scanning transmission electron microscopy (HAADF-STEM). The β′ precipitates have an about 20 nm size and definite facets parallel to the (010) plane, and Y-enriched double atom planes parallel to the (010) plane grow long and sometimes individually along the [100] and [001] directions. This morphology of the β′ precipitates in the Mg98Y2 alloy is remarkably different from that in an Mg95Gd5 alloy.

Original languageEnglish
Pages (from-to)84-87
Number of pages4
JournalMaterials Transactions
Volume48
Issue number1
DOIs
Publication statusPublished - 2007 Jan

Keywords

  • High-angle annular detector dark-field scanning transmission electron microscopy
  • Magnesium alloy
  • Magnesium-rare earth alloy
  • Magnesium-yttrium
  • Mg-y
  • Precipitate

ASJC Scopus subject areas

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

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