Fabrication of oxide dispersion strengthened alloys through solid-state reactions between Fe[sbnd]Al and Fe 2 O 3 powders

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Abstract

A novel procedure of ODS alloy fabrication was examined using a model alloy in the Fe[sbnd]Al[sbnd]O ternary system. Nano-sized Al oxides were precipitated within the α-Fe matrix through a reaction between Fe[sbnd]Al and Fe 2 O 3 powders. Two types of oxides, FeAl 2 O 4 and γ-Al 2 O 3 , were found to precipitate during sintering at 1000 °C and the subsequent annealing at 800 °C. The oxides showed sluggish coarsening at 800 °C, which then provided high resistance to coarsening for the α-Fe grains. Microstructure observation and Vickers hardness measurement indicated that the homogeneous dispersion of oxides was achieved through the present procedure without ball milling.

Original languageEnglish
Pages (from-to)68-74
Number of pages7
JournalMaterials Science and Engineering A
Volume754
DOIs
Publication statusPublished - 2019 Apr 29

Keywords

  • Age hardening
  • Electron microscopy
  • Iron alloy
  • Oxide-dispersion-strengthened alloy
  • Precipitation
  • Solid oxygen source

ASJC Scopus subject areas

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

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