Microstructures and Tensile Properties of Fe-Cr-Al Oxide Dispersion Strengthened Ferritic Alloys for High Temperature Service Components

In present study, Fe-22Cr-4.5Al oxide dispersion strengthened ferritic alloys were fabricated using a pre-alloyed powder with different minor alloying elements, and their microstructures and tensile properties were investigated to develop the advanced structural materials for high temperature servic...

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Bibliographic Details
Published in:Archives of metallurgy and materials 2023-01, Vol.68 (1), p.85-88
Main Authors: Park, Minha, Bae, Jaeyoon, Kim, Byung Jun, Kim, Bu-An, Noh, Sanghoon
Format: Article
Language:English
Subjects:
Alloy powders
Alloying elements
Alloys
Carbon
Chromium
complex oxide
Corrosion resistance
Dispersion hardening alloys
Dispersion hardening steels
fe-cr-al
ferritic alloy
Ferritic stainless steel
Ferritic stainless steels
Grain boundaries
Heat resistant alloys
High temperature
Hot pressing
Iron
Mechanical alloying
Microstructure
Morphology
Oxide dispersion strengthening
oxide dispersion strengthening (ods)
Particle size
Tensile properties
tensile strength
Titanium
Zirconium
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Summary:In present study, Fe-22Cr-4.5Al oxide dispersion strengthened ferritic alloys were fabricated using a pre-alloyed powder with different minor alloying elements, and their microstructures and tensile properties were investigated to develop the advanced structural materials for high temperature service components. Planetary-typed mechanical alloying and uniaxial hot pressing processes were employed to fabricate the Fe-Cr-Al oxide dispersion strengthened ferritic alloys. Microstructural observation revealed that oxide dispersion strengthened ferritic alloys with Ti, Zr additions presented extremely fine micro-grains with a high number density of nano-scaled oxide particles which uniformly distributed in micro-grains and on the grain boundaries. These oxide particles were confirmed as a fine complex oxide, Y2Zr2O7. These favorable microstructures led to superior tensile properties than commercial ferritic stainless steel and oxide dispersion strengthened ferritic alloy with only Ti addition at elevated temperature.
ISSN:2300-1909
1733-3490
2300-1909
DOI:10.24425/amm.2023.141477