Reducing surface roughness of metallic freeform-fabricated parts using non-tactile finishing methods
by J.A. Ramos-Grez, D.L. Bourell
International Journal of Materials and Product Technology (IJMPT), Vol. 21, No. 4, 2004

Abstract: Metallic parts created using current freeform fabrication processes have an unacceptably high surface finish (R_a » 1:0 mm) for many functional applications. This paper addresses the use of non-tactile laser polishing for surface finishing of commercial selective laser sintered iron±copper parts. A laser polishing window of energy density for roughness reduction up to a 37% of the original R_a value ranged between ~250 and 580 J cm^-2. Several surface melting regimes are identified and analysed. The impact of oxidation on surface finish is discussed.

Online publication date: Mon, 26-Jul-2004

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