An Experimental Characterization of Powder/Substrate Interaction during Direct Metal Deposition for Additive Manufacturing

The physical behavior of metal powders during laser-based additive manufacturing processes has been investigated. In particular, an experimental campaign of direct metal deposition has been carried out to evaluate the effect of the laser power and spot size on the powder/substrate interaction and on...

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Bibliographic Details
Published in:Key engineering materials 2019-07, Vol.813, p.435-440, Article 435
Main Authors: Squillace, Antonino, Scherillo, Fabio, Salatino, Piero, El Hassanin, Andrea, Silvestri, Alessia Teresa, Troiano, Maurizio, Solimene, Roberto
Format: Article
Language:English
Subjects:
Additive manufacturing
Deposition
Impact velocity
Laser applications
Lasers
Metal powders
Morphology
Particle impact
Substrates
Surface properties
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Summary:The physical behavior of metal powders during laser-based additive manufacturing processes has been investigated. In particular, an experimental campaign of direct metal deposition has been carried out to evaluate the effect of the laser power and spot size on the powder/substrate interaction and on the surface morphology of the final piece. A fast-camera has been used to evaluate the interaction phenomena during the printing process, while confocal microscopy has been carried out to measure the surface morphology of the samples. Results highlighted that increasing the laser power and laser spot size, the particle impact velocity is about constant, while the powder/laser/substrate interaction zone increases. As a consequence, the mean thickness increases, as confirmed by surface characterization.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.813.435