On the influence of different superficial laser texturing on the deposition of powders through cold spray process

Cold spray is a technique allowing the deposition of metallic powders on several different substrates. The deposition process is ruled by different factors, among these, of particular interest are the superficial roughness and texturing of the substrate. The aim of this research was to study the inf...

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Bibliographic Details
Published inTransactions of the Institute of Metal Finishing Vol. 96; no. 1; pp. 34 - 40
Main Authors Viscusi, A., Astarita, A., Genna, S., Leone, C.
Format Journal Article
LanguageEnglish
Published Taylor & Francis 02.01.2018
Subjects
Coating adhesion
Coating microstructure
Cold spray deposition
Fibre laser
Laser texturing
Particle bonding
Substrate-coating interface
Superficial treatments
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Summary:Cold spray is a technique allowing the deposition of metallic powders on several different substrates. The deposition process is ruled by different factors, among these, of particular interest are the superficial roughness and texturing of the substrate. The aim of this research was to study the influence of different superficial texturing on the deposition process of aluminium powders on an AA 2024 T3 plate. Samples with different superficial texturing were produced by laser engraving through a Yb:YAG fibre laser, varying the laser treatment parameters. Aiming to highlight the influence of the laser treatment, the deposition process was carried out on all the samples under the same spraying condition. The cross-section of the interface between the substrate and the coating and the microstructure of the coating itself were observed to study the influence of the superficial texturing on the coating formation. It was found that the superficial texturing influences both the adhesion mechanism and the microstructure of the coating.
ISSN:0020-2967
1745-9192
DOI:10.1080/00202967.2018.1403096