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Open AccessFeature PaperArticle

Post-Processing of Complex SLM Parts by Barrel Finishing

Department of mechanical and aerospace engineering, Sapienza University of Rome Via Eudossiana 18, 00184 Rome, Italy
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Appl. Sci. 2020, 10(4), 1382; https://doi.org/10.3390/app10041382
Received: 24 January 2020 / Revised: 13 February 2020 / Accepted: 14 February 2020 / Published: 19 February 2020
(This article belongs to the Special Issue New Trends on Selective Laser Melting)
Selective laser melting (SLM) enables the production of metal complex shapes that are difficult or impossible to obtain with conventional production processes. However, the attainable surface quality is insufficient for most applications; thus, a secondary finishing is frequently required. Barrel finishing is an interesting candidate but is often applied without consistent criteria aimed at finding processing parameters. This work presents a methodology based on Bagnold number evaluation and bed behavior diagram, developed on experimental apparatus with different charges and process parameters. The experimentation on an industrial machine and the profilometric analysis allowed the identification of appropriate process parameters and charge media for finishing the investigated materials (Ti6Al4V and Inconel718). Two case studies, characterized by complex shapes, were considered, and consistent surface measures allowed understanding the capability of the technology. View Full-Text
Keywords: selective laser melting; barrel finishing; Ti6Al4V; Inconel718; post processing; roughness selective laser melting; barrel finishing; Ti6Al4V; Inconel718; post processing; roughness
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Boschetto, A.; Bottini, L.; Macera, L.; Veniali, F. Post-Processing of Complex SLM Parts by Barrel Finishing. Appl. Sci. 2020, 10, 1382.

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