| Issue |
Manufacturing Rev.
Volume 7, 2020
Special Issue - The emerging materials and processing technologies
|
|
|---|---|---|
| Article Number | 8 | |
| Number of page(s) | 7 | |
| DOI | https://doi.org/10.1051/mfreview/2020008 | |
| Published online | 28 February 2020 | |
Research Article
Edge and corner effects in selective laser melting of IN 625 alloy
Romanian Research, Development Institute for Gas Turbines, COMOTI, Bucharest, Romania
* e-mail: gheorghe.matache@comoti.ro
Received:
3
December
2019
Accepted:
28
January
2020
Experimental investigations on top surface of prismatic specimens, manufactured by Selective Laser Melting of IN 625 alloy, were carried out in order to assess the influence of laser power and scanning speed on edge and corner effects. Since the melt-pool behaviour is strongly influenced by the process parameters, all specimens were manufactured with no contour using the same layer thickness, hatch distance and scanning strategy at different levels of laser powers and scanning speeds. 3D laser surface scanning was performed in order to measure surface changes. The experimental results have revealed that melt-pool behaviour during solidification generates elevated ridges on both specimen sides and corners that are strongly influenced by the energy input. The edge ridges width increases with increasing the laser power and decrease with increasing the scanning speed, the rising of corners being much more pronounced. On the contrary, at constant laser power and variable scanning speeds the edge and corner ridges decrease.
Key words: Edge effect / corner effect / selective laser melting / process parameters
© G. Matache et al., Published by EDP Sciences 2020
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