Please use this identifier to cite or link to this item: https://doi.org/10.3390/ma14061376
Title: Post-processing and surface characterization of additively manufactured stainless steel 316l lattice: implications for biomedical use
Authors: Teo, Alex Quok An
Yan, Lina 
Chaudhari, Akshay 
O’neill, G.K.
Keywords: Additive manufacturing
Biomedical implants
Post-processing
Stainless steel 316L
Surface residue
Issue Date: 12-Mar-2021
Publisher: MDPI AG
Citation: Teo, Alex Quok An, Yan, Lina, Chaudhari, Akshay, O’neill, G.K. (2021-03-12). Post-processing and surface characterization of additively manufactured stainless steel 316l lattice: implications for biomedical use. Materials 14 (6) : Jan-23. ScholarBank@NUS Repository. https://doi.org/10.3390/ma14061376
Rights: Attribution 4.0 International
Abstract: Additive manufacturing of stainless steel is becoming increasingly accessible, allowing for the customisation of structure and surface characteristics; there is little guidance for the post-processing of these metals. We carried out this study to ascertain the effects of various combinations of post-processing methods on the surface of an additively manufactured stainless steel 316L lattice. We also characterized the nature of residual surface particles found after these processes via energy-dispersive X-ray spectroscopy. Finally, we measured the surface roughness of the post-processing lattices via digital microscopy. The native lattices had a predictably high surface roughness from partially molten particles. Sandblasting effectively removed this but damaged the surface, intro-ducing a peel-off layer, as well as leaving surface residue from the glass beads used. The addition of either abrasive polishing or electropolishing removed the peel-off layer but introduced other surface deficiencies making it more susceptible to corrosion. Finally, when electropolishing was performed after the above processes, there was a significant reduction in residual surface particles. The constitution of the particulate debris as well as the lattice surface roughness following each post-processing method varied, with potential implications for clinical use. The work provides a good base for future development of post-processing methods for additively manufactured stainless steel. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Source Title: Materials
URI: https://scholarbank.nus.edu.sg/handle/10635/232502
ISSN: 1996-1944
DOI: 10.3390/ma14061376
Rights: Attribution 4.0 International
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