Microstructure and mechanical properties of austenitic ODS steel processed using Ni–20Cr

Austenitic oxide dispersion strengthened (AODS) steel of composition Fe–22Ni–18Cr–1.5W–0.22Ti–0.35Y 2 O 3 (wt%) was fabricated using Ni–20Cr (instead of commonly used Ni) in second–stage ball milling. Mechanical alloying process for producing AODS powder was studied by measuring the yield and averag...

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Bibliographic Details
Published in:Journal of materials research 2023-04, Vol.38 (8), p.2179-2187
Main Authors: Karthik, P. Sai, Ganesh, S., Ninawe, P. S., Battabyal, M., Chandrasekhar, S. B., Vijay, R.
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Austenitic stainless steels
Ball milling
Biomaterials
Chemistry and Materials Science
Dispersion hardening alloys
Dispersion hardening steels
Dispersions
Elongation
Grain size
Hot extrusion
Inorganic Chemistry
Materials Engineering
Materials research
Materials Science
Mechanical alloying
Mechanical properties
Nanotechnology
Oxide dispersion strengthening
Room temperature
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Summary:Austenitic oxide dispersion strengthened (AODS) steel of composition Fe–22Ni–18Cr–1.5W–0.22Ti–0.35Y 2 O 3 (wt%) was fabricated using Ni–20Cr (instead of commonly used Ni) in second–stage ball milling. Mechanical alloying process for producing AODS powder was studied by measuring the yield and average size of milled powder. After 5 h of second–stage milling, the yield/s of milled powder was found to be 75% with Ni–20Cr and 42% with Ni. AODS powder was subsequently consolidated using hot extrusion and solution annealed. The consolidated samples exhibited austenitic grain size of 0.43 ± 0.19 µm along with Y 2 Ti 2 O 7 dispersoids of size 
ISSN:0884-2914
2044-5326
DOI:10.1557/s43578-023-00938-6