About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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Symposium
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Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
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Presentation Title |
Enhancement of Mechanical Properties of Ni-Based ODS HEA by Optimization of Oxide Dispersoid Content |
Author(s) |
Manashi Sabat, Sudhansu Maharana, Tapas Laha |
On-Site Speaker (Planned) |
Manashi Sabat |
Abstract Scope |
Oxide dispersion strengthened high entropy alloys (ODS HEAs) are advanced materials that integrate high entropy alloys properties with strengthening effect of oxide dispersoid, promising for high-temperature applications. The study focuses on optimizing oxide dispersoids in Ni-based ODS HEAs to improve strength-ductility synergy and broaden their utility. Ni-based ODS HEA with composition Ni47Al6Co18Cr8Fe12Ti8W1 at% was fabricated via mechanical alloying and spark plasma sintering. This research investigates the effect of Y2O3 content (1 to 5 vol%) on microstructural evolution and mechanical properties of ODS HEA. XRD results reveal precipitation of Y2Ti2O7 complex oxide in 3 vol% and 5 vol% ODS HEA. Highest compressive yield strength of 1517 MPa and compressive strain of 27% was achieved in 3 vol% Y2O3 ODS HEA, which decreased in 5 vol% Y2O3 ODS HEA. This decrease is ascribed to agglomeration of Y2O3 nanoparticles at higher Y2O3 content ODS HEA. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Other, Other |