About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Materials Design and Alloy Development V – Design Fundamentals
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Presentation Title |
Microstructure and Mechanical Properties of In-situ Nano Oxide Reinforced CrMnFeCoNi High Entropy Alloy Matrix Composite Manufactured by Laser Powder Bed Fusion |
Author(s) |
Kee-Ahn Lee, Young-Kyun Kim |
On-Site Speaker (Planned) |
Kee-Ahn Lee |
Abstract Scope |
CrMnFeCoNi high-entropy alloys (HEAs) exhibit an excellent combination of tensile strength and ductility. This study led to the suggestion of a new method for the development of high performance HEAs by jointly utilizing additive manufacturing (AM) and the addition of interstitial atoms. The interstitial oxygen present in the powder feedstock was transformed into beneficial nano-sized oxides during AM processing. The microstructure, tensile, impact toughness, fatigue, and cryogenic, and hydrogen charging mechanical properties of the in-situ nano oxide reinforced CrMnFeCoNi alloy matrix composite manufactured by laser powder bed fusion were investigated. The HEA nanocomposite represented superior yield strengths of 0.77 GPa and 1.15 GPa and tensile strengths of 0.92 GPa and 1.45 GPa at 298 K and 77 K. Charpy impact and fatigue results showed the impact energies of 176.2 J and the fatigue strength of 280 MPa. The deformation and fracture mechanisms of the HEA composite was also discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, High-Entropy Alloys, Mechanical Properties |