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Laser surface polishing of Ti-6Al-4V parts manufactured by laser powder bed fusion

Obeidi, Muhannad A. orcid logoORCID: 0000-0003-2733-3828, Mussatto, Andre orcid logoORCID: 0000-0001-5335-7968, Doğu, Merve Nur orcid logoORCID: 0000-0003-1843-6040, Sreenilayam, Sithara orcid logoORCID: 0000-0002-5282-3645, McCarthy, Éanna, Ahad, Inam Ul orcid logoORCID: 0000-0002-3802-6156, Keaveney, Shane and Brabazon, Dermot orcid logoORCID: 0000-0003-3214-6381 (2022) Laser surface polishing of Ti-6Al-4V parts manufactured by laser powder bed fusion. Surface and Coatings Technology, 434 . p. 128179. ISSN 0257-8972

Abstract
Poor surface quality of Additively Manufactured (AM) components, can greatly increase the overall cost and lead time of high-performance components. Examples are medical devices where surfaces may contact the patient’s skin and hence need to be smooth and aerospace components with high fatigue strength requirements where surface roughness could reduce fatigue life. The average surface roughness (Ra) of AM parts can reach high levels greater than 50 microns and maximum distance between the high peaks and the low valleys of more than 300 microns. As such, there is a need for fast, cost effective and selective finishing methods of AM produced components targeted at high-performance industries. In this paper Ti-6Al-4V Grade 23 ELI, popular for medical devices and aerospace parts production, was L-PBF processed to manufacture parts which were subsequently treated via laser polishing. Here in this work, CO2 laser polishing was used for the surface modification of the Ti-6Al-4V produced samples. The most significant processing parameters were optimised to achieve approximately an 80% reduction in the average surface roughness and a 90% reduction in the peak-to-valley distance with a processing time of 0.1 sec/mm2 and cost of 0.2 €/cm2.
Metadata
Item Type:Article (Published)
Refereed:Yes
Uncontrolled Keywords:Laser polishing; Ti-6Al-4V; Powder bed fusion; Biomedical application; Additive manufacturing; Surface profile roughness
Subjects:Engineering > Materials
Engineering > Mechanical engineering
Engineering > Production engineering
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Engineering and Computing > School of Mechanical and Manufacturing Engineering
Research Initiatives and Centres > Advanced Processing Technology Research Centre (APTRC)
Research Initiatives and Centres > I-Form
Publisher:Elsevier
Official URL:https://doi.org/10.1016/j.surfcoat.2022.128179
Copyright Information:© 2022 The Authors.
Funders:Science Foundation Ireland (SFI) under grant number 16/RC/3872, European Regional Development Fund
ID Code:26728
Deposited On:04 Mar 2022 12:12 by Sithara Sreenilayam . Last Modified 21 Dec 2023 15:05
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