Experimental investigation of melt pool behaviour during selective laser melting by high speed imaging

Melt pool behaviour and the characteristics of the surrounding metal powder during selective laser melting (SLM) are captured using high-speed imaging, and the influence of the substrate temperature and the line building sequence on the formation of the built structure and the generation of spatter...

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Bibliographic Details
Published in:CIRP annals 2018, Vol.67 (1), p.253-256
Main Authors: Furumoto, Tatsuaki, Egashira, Kyota, Munekage, Kenta, Abe, Satoshi
Format: Article
Language:English
Subjects:
Monitoring
Selective laser melting (SLM)
Spatter particles
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Summary:Melt pool behaviour and the characteristics of the surrounding metal powder during selective laser melting (SLM) are captured using high-speed imaging, and the influence of the substrate temperature and the line building sequence on the formation of the built structure and the generation of spatter particles is experimentally investigated. The results indicate that the substrate temperature has a measurable effect on the formation of droplets and the generation of spatter particles, while the volume specific energy density of the process was the principal factor affecting the built structure.
ISSN:0007-8506
DOI:10.1016/j.cirp.2018.04.097