Header menu link for other important links
X
Influence of γ-alumina coating on surface properties of direct metal laser sintered 316L stainless steel
Published in Elsevier BV
2019
Volume: 45
   
Issue: 10
Pages: 13456 - 13463
Abstract
Direct metal laser sintering (DMLS)is an additive manufacturing technique that enables the production of customized and complex shaped stainless steel products. Application of DMLS parts to critical sectors requires enhanced surface properties. Although extensive research has been undertaken by many investigators on γ-alumina coating on conventionally processed SS 316L, there has been no significant exploration of the properties of SS 316 L processed through DMLS process with and without coating. In this study, an attempt has been made to coat γ-alumina ceramics over 316L SS substrate and report its effects. γ-alumina synthesised using sol-gel technique was examined through Fourier-Transform Infrared Spectroscopy and X- Ray Diffractometer. The coating were 28–36.77 μm thick and had amorphous structures. Characterization on coated substrate displayed a 33.87% increases in hardness and 81.91% increase in roughness. The water contact angle of the coated substrate exceeded bare substrate measurements by over 340. I corr value of 0.0967 for coated substrate confirmed the anti-corrosive behaviour, which was found to be very much an essential requirements for this study. Compared with conventional processed SS 316L, the performance of DMLS SS 316L, the performance of DMLS SS 316L bare substrate and coated substrate are mainly governed by properties such as porosity, laser scanning effect, in build residual stress and surface finish. The development of uniform and adherent coating of γ-alumina acts as a mechanical barrier for enhancement of the surface properties which will enlighten the research and applications in the fields of biomedical, aerospace and automobile industries. © 2019 Elsevier Ltd and Techna Group S.r.l.
About the journal
JournalData powered by TypesetCeramics International
PublisherData powered by TypesetElsevier BV
ISSN0272-8842
Open Access0
Authors (3)