Process optimization and quality control are important issues in cold spraying and coating development. Because the cold spray processing is based on high kinetic energy by high particle velocities, online spray monitoring of particle inflight properties can be used as an assisting process tool. Particle velocities, their positions in the spray jet, and particle size measurements give valuable information about spraying conditions. This, in turn, improves reproducibility and reliability of coating production. This study focuses on cold spraying of Al6061 material and the connections between particle inflight properties and coating characteristics such as structures and mechanical properties. Furthermore, novel 2D velocity scan maps done with theHWCS2 online spray monitoring system are presented as an advantageous powder and spray condition controlling tool. Cold spray processing conditions were similar using different process parameters, confirmed with the online spray monitoring prior to coating production. Higher particle velocities led to higher particle deformation and thus, higher coating quality, denser structures, and improved adhesions. Also, deposition efficiency increased significantly by using higher particle velocities.

Cold-Sprayed Al6061 coatings. Online spray monitoring and influence of process parameters on coating properties / Koivuluoto, H.; Larjo, J.; Marini, D.; Pulci, G.; Marra, F.. - In: COATINGS. - ISSN 2079-6412. - 10:4(2020). [10.3390/coatings10040348]

Cold-Sprayed Al6061 coatings. Online spray monitoring and influence of process parameters on coating properties

Marini D.;Pulci G.;Marra F.
2020

Abstract

Process optimization and quality control are important issues in cold spraying and coating development. Because the cold spray processing is based on high kinetic energy by high particle velocities, online spray monitoring of particle inflight properties can be used as an assisting process tool. Particle velocities, their positions in the spray jet, and particle size measurements give valuable information about spraying conditions. This, in turn, improves reproducibility and reliability of coating production. This study focuses on cold spraying of Al6061 material and the connections between particle inflight properties and coating characteristics such as structures and mechanical properties. Furthermore, novel 2D velocity scan maps done with theHWCS2 online spray monitoring system are presented as an advantageous powder and spray condition controlling tool. Cold spray processing conditions were similar using different process parameters, confirmed with the online spray monitoring prior to coating production. Higher particle velocities led to higher particle deformation and thus, higher coating quality, denser structures, and improved adhesions. Also, deposition efficiency increased significantly by using higher particle velocities.
2020
Al6061; aluminum; coatings; cold spray; diagnostics; online monitoring; process parameters
01 Pubblicazione su rivista::01a Articolo in rivista
Cold-Sprayed Al6061 coatings. Online spray monitoring and influence of process parameters on coating properties / Koivuluoto, H.; Larjo, J.; Marini, D.; Pulci, G.; Marra, F.. - In: COATINGS. - ISSN 2079-6412. - 10:4(2020). [10.3390/coatings10040348]
File allegati a questo prodotto
File Dimensione Formato  
Koivuluoto_Cold-Sprayed-Al6061_2020.pdf

accesso aperto

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Creative commons
Dimensione 4.14 MB
Formato Adobe PDF
4.14 MB Adobe PDF

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/11573/1455627
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 20
  • ???jsp.display-item.citation.isi??? 17
social impact