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dc.titlePost-processing and surface characterization of additively manufactured stainless steel 316l lattice: implications for biomedical use
dc.contributor.authorTeo, Alex Quok An
dc.contributor.authorYan, Lina
dc.contributor.authorChaudhari, Akshay
dc.contributor.authorO’neill, G.K.
dc.identifier.citationTeo, 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.
dc.description.abstractAdditive 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.
dc.publisherMDPI AG
dc.rightsAttribution 4.0 International
dc.sourceScopus OA2021
dc.subjectAdditive manufacturing
dc.subjectBiomedical implants
dc.subjectStainless steel 316L
dc.subjectSurface residue
dc.contributor.departmentDEPT OF MECHANICAL ENGINEERING
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