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Metals 2017, 7(12), 521; https://doi.org/10.3390/met7120521

Permeability Study of Austenitic Stainless Steel Surfaces Produced by Selective Laser Melting

1
Tecnologico de Monterrey, Escuela de Ingeniería y Ciencias, Avenida Eugenio Garza Sada #2501 Sur, Monterrey, Nuevo Leon 64849, Mexico
2
Laboratorio Nacional de Manufactura Aditiva, Digitalización 3D y Tomografía Computarizada, MADiT, Centro de Ciencias Aplicadas y Desarrollo Tecnológico (CCADET), Universidad Nacional Autónoma de México (UNAM), Circuito Exterior S/N, Ciudad Universitaria AP 70-186, Ciudad de México 04510, Mexico
3
Department of Engineering Technology, University of North Texas, 3940 North Elm Street, Denton, TX 76207, USA
*
Author to whom correspondence should be addressed.
Received: 20 October 2017 / Revised: 6 November 2017 / Accepted: 17 November 2017 / Published: 24 November 2017
(This article belongs to the Special Issue Metallic Additive Manufacturing: Design, Process and Post-processing)
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Abstract

Selective laser melting (SLM) is emerging as a versatile process for fabricating different metal components with acceptable mechanical properties and geometrical accuracy. The process has been used in the manufacturing of several parts (e.g., aerospace or biomedical components), and offers the capability to tailor the performance of several surface and mechanical properties. In this work, permeability properties and surface roughness of stainless steel (SS316L) surfaces were evaluated through experimentation with three different laser scanning patterns (chessboard, meander, and stripe), and different sloping angles between the fabricated surface and the laser beam incident on the process. Results showed that for each scanning pattern, the roughness decreased as the sloping angle increased consistently in all experimental trials. Furthermore, in the case of the permeability evaluation, the manufactured surfaces showed changes in properties for each series of experiments performed with different scanning patterns. The chessboard pattern showed a change of 67° to 107° in contact angle, while the meander and stripe patterns showed a variation in contact angle in a range of 65° to 85°. The different scanning strategies in the SLM process resulted in an alternative method for surface enhancement with different hydrophobicity properties, valuable for designing the most appropriate permeability characteristics for specific applications. View Full-Text
Keywords: selective laser melting; stainless steel; surface quality; permeability selective laser melting; stainless steel; surface quality; permeability
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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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Segura-Cardenas, E.; Ramirez-Cedillo, E.G.; Sandoval-Robles, J.A.; Ruiz-Huerta, L.; Caballero-Ruiz, A.; Siller, H.R. Permeability Study of Austenitic Stainless Steel Surfaces Produced by Selective Laser Melting. Metals 2017, 7, 521.

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