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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

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Keywords

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

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Abstract

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).

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How Our Software Was Used

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

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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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