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Effect of process parameters on the surface roughness of overhanging structures in laser powder bed fusion additive manufacturing

Published

Author(s)

Jason Fox, Shawn P. Moylan, Brandon Lane

Abstract

The development of additive manufacturing has allowed for increased flexibility and complexity of designs over formative and subtractive manufacturing. However, a limiting factor of additive manufacturing is the as-built surface quality as well as the difficulty in maintaining an acceptable surface roughness in overhanging structures. In order to optimize surface roughness in these structures, samples covering a range of overhang angles and process parameters were built in a laser powder bed fusion system. Analysis of the surface roughness was then performed to determine a relationship between process parameters, angle of the overhanging surface, and surface roughness. It was found that the analysis of Rpc, Rsm, and Rc can indicate a shift between surfaces dominated by partially melted powder particles and surfaces dominated by material from the re-solidified melt track.
Proceedings Title
Procedia CIRP
Volume
45
Conference Dates
June 8-10, 2016
Conference Location
Charlotte, NC, US
Conference Title
3rd CIRP Conference on Surface Integrity (CIRP CSI)

Keywords

Selective Laser Melting (SLM), Roughness, Overhangs, additive manufacturing

Citation

Fox, J. , Moylan, S. and Lane, B. (2016), Effect of process parameters on the surface roughness of overhanging structures in laser powder bed fusion additive manufacturing, Procedia CIRP, Charlotte, NC, US, [online], https://doi.org/10.1016/j.procir.2016.02.347, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=919999 (Accessed June 21, 2024)

Issues

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Created June 4, 2016, Updated April 18, 2022