Journal
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
Volume 242, Issue -, Pages 1-11Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2016.11.014
Keywords
Additive manufacturing; Selective laser melting; Build orientation; Surface finish; Electropolishing allowances; Ti-6Al-4V
Funding
- Fonds de developpement de l'ETS (FDETS)
- Fonds de recherche du Quebec-Nature et Technologies (FRQ - NT)
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Consortium de Recherche et d'Innovation en Aerospatiale au Quebec (CRIAQ)
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This study allowed the current density optimization for the efficient electropolishing of Ti-6Al-4V test coupons containing multiple surfaces, which were oriented with respect to the building platform under angles varying from 0 to 135 degrees. It was shown that despite a large scatter in the as-built surface finish, ranging from Ra = 4 mu m (0 degrees) to Ra = 23 mu m (135 degrees),all the differently-oriented surfaces were polished down to a uniform roughness of Ra = 1-3 mu m. This means that the higher the as-built surface roughness, the larger the quantity of the material needed to be removed during electropolishing in order to reach a uniform level of surface finish. Finally, thickness evolution measurements during finishing of the differently-oriented test coupons allowed us to establish the build orientation-dependent allowances for the electropolishing of selectively laser-melted Ti-6Al-4V parts. (C) 2016 Elsevier B.V. All rights reserved.
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