The focus of this study is to assess the influence of a selective post-deposition laser treatment on the tribological and wear behavior of a titanium coating layer on aluminum. Titanium grade 2 powders were deposited onto an aluminum alloy AA2024-T3 sheet, by means of cold gas dynamic spray process. A selective laser post-treating was carried out by using a 220 W diode laser to enhanced wear properties of coatings. Tribo-tests were executed to analyze the tribological behavior of materials in contact with an alternative moving counterpart under a controlled normal load. Tribo-tests were performed on untreated aluminum sheets, titanium grade 2 sheet, as-sprayed titanium powders and laser-treated coating layer to compare the wear properties of different materials and the effectiveness of treatment. The results obtained proved the effectiveness of the laser treatment in improving the wear performances of the coating, in terms of both friction coefficient and mass lost. The laser treatment promotes a change of the wear mechanism, switching from a severe adhesive wear, resulting in the Galling phenomenon, to an abrasive wear.

Influence of Selective Post-Deposition Laser Treatment on Tribological and Wear Properties of Cold Sprayed Titanium Coatings

RUBINO, FELICE;CARLONE, PIERPAOLO;RUGGIERO, Alessandro;MEROLA, MASSIMILIANO;
2015

Abstract

The focus of this study is to assess the influence of a selective post-deposition laser treatment on the tribological and wear behavior of a titanium coating layer on aluminum. Titanium grade 2 powders were deposited onto an aluminum alloy AA2024-T3 sheet, by means of cold gas dynamic spray process. A selective laser post-treating was carried out by using a 220 W diode laser to enhanced wear properties of coatings. Tribo-tests were executed to analyze the tribological behavior of materials in contact with an alternative moving counterpart under a controlled normal load. Tribo-tests were performed on untreated aluminum sheets, titanium grade 2 sheet, as-sprayed titanium powders and laser-treated coating layer to compare the wear properties of different materials and the effectiveness of treatment. The results obtained proved the effectiveness of the laser treatment in improving the wear performances of the coating, in terms of both friction coefficient and mass lost. The laser treatment promotes a change of the wear mechanism, switching from a severe adhesive wear, resulting in the Galling phenomenon, to an abrasive wear.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/4662780
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact