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 |
Nanoindentation and AFM-Based Evaluation of Cold-Sprayed Stable Nanocrystalline High-Entropy Alloy Coatings |
Author(s) |
Kasimuthumaniyan Subramanian, Moses A Adaan-Nyiak, Philip Egberts, Ahmed A Tiamiyu |
On-Site Speaker (Planned) |
Kasimuthumaniyan Subramanian |
Abstract Scope |
Surfaces of structural engineering components that operate in extreme environments often experience premature failure and reduced service life due to corrosion, severe wear, and abrasion. To mitigate such degradation and protect the underlying substrate, coatings are extensively utilized. Using instrumented nanoindentation and atomic force microscopy, we examine the nanomechanical response and elasto-plastic behavior of newly developed lightweight, stable nanocrystalline high-entropy alloy (HEA) coatings deposited on an A36 steel substrate via the cold-spray method. Two variants of HEA coatings were investigated: undoped Al25Co25Cr25Fe25 and doped Al24.6Co24.6Cr24.6Fe24.6Zr1.5. Albeit being 25% lighter, they exhibit nearly four times the hardness of the steel substrate. Furthermore, the HEA coatings subjected to annealing treatment exhibit notable enhancements in hardness and elastic moduli. Overall, we report the thermal stability of the HEA coatings developed and the operating strengthening sources that contribute to their improved specific hardness. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Surface Modification and Coatings, Mechanical Properties |