The mechanical performance and the microstructure of thin-film coatings deposited on selective laser melted (SLMed) Ti-6Al-4V were investigated. Specifically, the focus was on how properties like mechanical strength and surface roughness of the substrate affected the performance of film deposited by High-Power Impulse Magnetron Sputtering (HiPIMS). The substrate was a SLMed Ti-6Al-4V alloy, heat-treated either below or above the -transus, finished by different grit sizes to get smooth and rough surfaces, and coated with AlCrN film. Scratch adhesion on harder surfaces treated below the -transus was higher, whilst the substrate finishing had a negligible effect. Conversely, in ball-on-disc sliding wear tests, substrate roughness had a dominant effect: rough surfaces always resulted in earlier cracking and delamination of the coating. Microstructure was investigated by scanning electron microscopy and light microscopy to study the cross-sectional area and topography of the coating.

Characterization of AlCrN films deposited on selective laser melted Ti6Al4V substrates / Cerri, Emanuela; Ghio, Emanuele; Bertè, Alessandro; Paolo, Colombi; Bolelli, Giovanni. - In: LA METALLURGIA ITALIANA. - ISSN 0026-0843. - (2024), pp. 32-37.

Characterization of AlCrN films deposited on selective laser melted Ti6Al4V substrates

Cerri Emanuela
;
Ghio Emanuele
;
2024-01-01

Abstract

The mechanical performance and the microstructure of thin-film coatings deposited on selective laser melted (SLMed) Ti-6Al-4V were investigated. Specifically, the focus was on how properties like mechanical strength and surface roughness of the substrate affected the performance of film deposited by High-Power Impulse Magnetron Sputtering (HiPIMS). The substrate was a SLMed Ti-6Al-4V alloy, heat-treated either below or above the -transus, finished by different grit sizes to get smooth and rough surfaces, and coated with AlCrN film. Scratch adhesion on harder surfaces treated below the -transus was higher, whilst the substrate finishing had a negligible effect. Conversely, in ball-on-disc sliding wear tests, substrate roughness had a dominant effect: rough surfaces always resulted in earlier cracking and delamination of the coating. Microstructure was investigated by scanning electron microscopy and light microscopy to study the cross-sectional area and topography of the coating.
2024
Characterization of AlCrN films deposited on selective laser melted Ti6Al4V substrates / Cerri, Emanuela; Ghio, Emanuele; Bertè, Alessandro; Paolo, Colombi; Bolelli, Giovanni. - In: LA METALLURGIA ITALIANA. - ISSN 0026-0843. - (2024), pp. 32-37.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2979533
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