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 |
Indentation Deformation Behavior of Cold-Sprayed Nanocrystalline High-Entropy Alloys |
Author(s) |
Kasimuthumaniyan Subramanian, Moses A Adaan-Nyiak, Philip Egberts, Ahmed A Tiamiyu |
On-Site Speaker (Planned) |
Kasimuthumaniyan Subramanian |
Abstract Scope |
Metallic surfaces of structural components functioning in reactive abrasive and corrosive conditions often fail prematurely. Therefore, coatings are most widely applied to mitigate such surface degradation effects and preserve the underlying substrate. Herein, we investigate the nanomechanical elasto-plastic response of lightweight stable nanocrystalline high-entropy alloy (HEA) coatings deposited via cold-spray technique on an A36 steel substrate using nanoindentation technique and atomic force microscopy. Specifically, undoped Al25Co25Cr25Fe25 and doped Al24.6Co24.6Cr24.6Fe24.6Zr1.5 HEA coatings are examined; each approximately 8 μm thick. Despite being 25% lighter, the coatings' hardness is almost 4 times higher than that of the steel substrate. Interestingly, HEA coatings subjected to heat treatment also show notable improvements in hardness and elastic moduli. Altogether, we report the thermal stability of the nanocrystalline HEA coatings developed and the role of elasto-plastic behavior that governs the hardness and moduli of the coatings and substrate. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Surface Modification and Coatings, Mechanical Properties |