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Scientific Publication Citing Dragonfly

Laser powder bed fusion of water-atomized iron-based powders: process optimization

Morgan Letenneur (1), Vladimir Brailovski (1), Alena Kreitcberg (1), Vladimir Paserin (2), and Ian Bailon-Poujol (2)
Journal of Manufacturing and Materials Processing, 1, Issue 2, December 2017 : 23. DOI: 10.3390/jmmp1020023


Additive manufacturing, Laser powder bed fusion, Process optimization, Water atomized, Iron based powder


The laser powder bed fusion (L-PBF) technology was adapted for use with non-spherical economical water-atomized iron powders. A simplified numerical and experimental modeling approach was applied to determine—in a first approximation—the operation window for the selected powder in terms of laser power, scanning speed, hatching space, and layer thickness. The operation window, delimited by a build rate ranging from 4 to 25 cm3/h, and a volumetric energy density ranging from 50 to 190 J/mm3, was subsequently optimized to improve the density, the mechanical properties, and the surface roughness of the manufactured specimens. Standard L-PBF-built specimens were subjected to microstructural (porosity, grain size) and metrological (accuracy, shrinkage, minimum wall thickness, surface roughness) analyses and mechanical testing (three-point bending and tensile tests).

How Our Software Was Used

Dragonfly was used for image visualization, segmentation, processing and analysis.

Author Affiliation

(1) Department of Mechanical Engineering, École de technologie supérieure, 1100 Notre-Dame Street West, Montreal, QC H3C 1K3, Canada.
(2) Research and Development, Rio Tinto Metal Powders, 1655, route Marie-Victorin, Sorel-Tracy, QC J3R 4R4, Canada.

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