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Materials 2017, 10(1), 30; doi:10.3390/ma10010030

Reduction of Surface Roughness by Means of Laser Processing over Additive Manufacturing Metal Parts

Department of Industrial Engineering, University of Salerno, 84084 Fisciano, Italy
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Academic Editor: Guillermo Requena
Received: 19 October 2016 / Revised: 20 December 2016 / Accepted: 27 December 2016 / Published: 31 December 2016
(This article belongs to the Section Manufacturing Processes and Systems)
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Abstract

Optimization of processing parameters and exposure strategies is usually performed in additive manufacturing to set up the process; nevertheless, standards for roughness may not be evenly matched on a single complex part, since surface features depend on the building direction of the part. This paper aims to evaluate post processing treating via laser surface modification by means of scanning optics and beam wobbling to process metal parts resulting from selective laser melting of stainless steel in order to improve surface topography. The results are discussed in terms of roughness, geometry of the fusion zone in the cross-section, microstructural modification, and microhardness so as to assess the effects of laser post processing. The benefits of beam wobbling over linear scanning processing are shown, as heat effects in the base metal are proven to be lower. View Full-Text
Keywords: laser processing; surface roughness; additive manufacturing laser processing; surface roughness; additive manufacturing
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Alfieri, V.; Argenio, P.; Caiazzo, F.; Sergi, V. Reduction of Surface Roughness by Means of Laser Processing over Additive Manufacturing Metal Parts. Materials 2017, 10, 30.

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