EFFECT OF COLD SPRAYING PARAMETERS ON THE DEPOSITION PERFORMANCE OF ADDITIVELY MANUFACTURED Ti6Al4V ALLOY
Abstract
Cold Spray (CS) is a solid-state coating technology where metal powders are propelled at supersonic velocities to form dense coatings via severe plastic deformation upon impact, without melting. This mechanism preserves the feedstock material's integrity by minimizing thermal degradation, such as oxidation and residual stresses, making it ideal for surface refurbishment and restoration in thermally sensitive applications. In this study, CS deposition was sprayed onto a Ti6Al4V substrate (60x60x4 mm³) fabricated via Selective Laser Melting (SLM), using spherical Ti6Al4V powders with a particle size distribution of 0–20 µm. The primary objective was to optimize CS process parameters to observe coating integrity and interfacial adhesion. Considering the limitations of low-pressure spraying, temperature, nozzle-distance, and advancement speed were fixed at constant values, while gas pressure and powder feed rate were systematically varied. Coating characteristics, including thickness, homogeneity, surface morphology, and adhesion—were evaluated through scanning electron microscopy (SEM). Subsequently, under the previously optimized selected parameter set, the effect of different advancement speeds (10, 20, 30, and 40 mm/s) on the accumulation behavior was analyzed.
Keywords
Additive Manufacturing, Cold Spray, Ti6Al4V, Coating, Advancement Speed
Supporting Institution
This study was partially funded by through TÜBİTAK 2566 Türkiye-China (NSFC) Bilateral Cooperation Projects
Project Number
Project #122N450
Ethical Statement
On behalf of my co-authors, I confirm that the manuscript has not been previously published elsewhere or simultaneously submitted to another journal.
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