Mechanics & Industry
Volume 17, Number 7, 2016STANKIN: Advanced scientific studies and research in Mechanical Engineering
|Number of page(s)||11|
|Published online||23 December 2016|
Study of oxygen effect on the melting pool temperature during selective laser melting
1 Moscow State University of Technology
“STANKIN”, Vadkovsky per.
2 University of Lyon, National Engineering School of Saint-Etienne, LTDS Laboratory, Saint-Etienne, France
a Corresponding author:
Accepted: 8 November 2016
The on-line optical diagnostics studies of selective laser melting are difficult to accomplish due to the need of closed chamber of inert gas protective atmosphere. In this term, this study was initiated to make evidence of oxygen influence on the signal from the melt pool. The results make clear the temperature growth with presence of oxygen and its effect on the metallurgical contact of the single-track to the substrate. It was shown that for both used materials, the oxidation leads to an overheating but the metallographic quality differs. The experiments highlighted that the optical diagnostic means such as IR thermography camera is suitable but not sufficient solution for process control and it needs adequate evaluation. Using the track width as an approximation of the melt pool width at melting point, it was possible with some assumptions to restore the true temperature of the studied zone.
Key words: Thermography / optical diagnostic / IR-camera / selective laser melting / oxidation
© AFM, EDP Sciences 2016
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