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 language | English |
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Pages (from-to) | 68-74 |
Number of pages | 7 |
Journal | Materials Science and Engineering A |
Volume | 754 |
DOIs | |
Publication status | Published - 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