On the Improvement of AA2024 Wear Properties through the Deposition of a Cold-Sprayed Titanium Coating
AbstractThis paper deals with the study of the enhancement of the tribological properties of AA2024 through the deposition of a titanium coating. In particular two different coatings were studied: (1) untreated titanium coating; and (2) post-deposition laser-treated titanium coating. Titanium grade 2 powders were deposited onto an aluminium alloy AA2024-T3 sheet through the cold gas dynamic spray process. The selective laser post treatment was carried out by using a 220 W diode laser to further enhance the wear properties of the coating. Tribo-tests were executed to analyse the tribological behaviour of materials in contact with an alternative moving counterpart under a controlled normal load. Four different samples were tested to assess the effectiveness of the treatments: untreated aluminium sheets, titanium grade 2 sheets, as-sprayed titanium powders and the laser-treated coating layer. The results obtained proved the effectiveness of the coating in improving the tribological behaviour of the AA2024. In particular the laser-treated coating showed the best results in terms of both the friction coefficient and mass lost. The laser treatment promotes a change of the wear mechanism, switching from a severe adhesive wear, resulting in galling, to an abrasive wear mechanism. View Full-Text
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Astarita, A.; Rubino, F.; Carlone, P.; Ruggiero, A.; Leone, C.; Genna, S.; Merola, M.; Squillace, A. On the Improvement of AA2024 Wear Properties through the Deposition of a Cold-Sprayed Titanium Coating. Metals 2016, 6, 185.
Astarita A, Rubino F, Carlone P, Ruggiero A, Leone C, Genna S, Merola M, Squillace A. On the Improvement of AA2024 Wear Properties through the Deposition of a Cold-Sprayed Titanium Coating. Metals. 2016; 6(8):185.Chicago/Turabian Style
Astarita, Antonello; Rubino, Felice; Carlone, Pierpaolo; Ruggiero, Alessandro; Leone, Claudio; Genna, Silvio; Merola, Massimiliano; Squillace, Antonino. 2016. "On the Improvement of AA2024 Wear Properties through the Deposition of a Cold-Sprayed Titanium Coating." Metals 6, no. 8: 185.