In the cold spray process, solid particles impact on a surface with high kinetic energy, deform plastically and form a coating. This enables the formation of pure and dense coating structures. Even more, coating performance and deposition efficiency can be improved by assisting the process with a laser. Laser-assisted cold spraying (LACS) has shown its potential to improve coating properties compared with traditional cold spraying. In this study, coating quality improvement was obtained by using a co-axial laser spray (COLA) process which offers a new, cost-effective laser-assisted cold spray technique, for high-quality deposition and repair. In the COLA process, the sprayed surface is laser heated while particles hit the surface. This assists the better bonding between particles and substrate and leads to the formation of tight coating structures. This study focuses on the evaluation of the microstructural characteristics and mechanical properties (e.g., hardness and bond strength) of LACS metallic coatings.

Structures and properties of laser-assisted cold-sprayed aluminum coatings / Koivuluoto, Heli; Milanti, Andrea; Bolelli, Giovanni; Latokartano, Jyrki; Marra, Francesco; Pulci, Giovanni; Vihinen, Jorma; Lusvarghi, Luca; Vuoristo, Petri. - STAMPA. - 879(2017), pp. 984-989. ((Intervento presentato al convegno 9th International conference on processing and manufacturing of advanced materials – THERMEC 2016 tenutosi a Gratz; Austria nel May 29 - June 3, 2016 [10.4028/www.scientific.net/MSF.879.984].

Structures and properties of laser-assisted cold-sprayed aluminum coatings

MARRA, FRANCESCO;PULCI, Giovanni;
2017

Abstract

In the cold spray process, solid particles impact on a surface with high kinetic energy, deform plastically and form a coating. This enables the formation of pure and dense coating structures. Even more, coating performance and deposition efficiency can be improved by assisting the process with a laser. Laser-assisted cold spraying (LACS) has shown its potential to improve coating properties compared with traditional cold spraying. In this study, coating quality improvement was obtained by using a co-axial laser spray (COLA) process which offers a new, cost-effective laser-assisted cold spray technique, for high-quality deposition and repair. In the COLA process, the sprayed surface is laser heated while particles hit the surface. This assists the better bonding between particles and substrate and leads to the formation of tight coating structures. This study focuses on the evaluation of the microstructural characteristics and mechanical properties (e.g., hardness and bond strength) of LACS metallic coatings.
File allegati a questo prodotto
File Dimensione Formato  
Koivuluoto_Structures-properties-laser_2017.pdf

solo utenti autorizzati

Note: Post print
Tipologia: Documento in Post-print (versione successiva alla peer review e accettata per la pubblicazione)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 181.39 kB
Formato Unknown
181.39 kB Unknown   Visualizza/Apri   Richiedi una copia

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: https://hdl.handle.net/11573/912794
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 7
  • ???jsp.display-item.citation.isi??? ND
social impact