Influence of overlap between the laser beam tracks on surface quality in laser polishing of AISI H13 tool steel

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DOIResolve DOI: http://doi.org/10.1016/j.jmapro.2012.09.004
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TypeArticle
Proceedings titleJournal of Manufacturing Processes
Conference40th North American Manufacturing Research Conference (NAMRC), June 5–8, 2012, South Bend, Indiana, U.S.A.
ISSN15266125
Volume14
Issue4
Pages425434; # of pages: 10
SubjectLaser polishing; Surface quality; Material ratio function; Power spectral density; Transfer function
AbstractPolishing by laser beam radiation is a novel manufacturing process to modify the initial surface topography in order to achieve a desired level of surface finish. The performance of laser polishing (LP) is determined by an optimum combination of several key process parameters. In this regard, the overlap between two successive laser beam tracks is one of the important LP process parameters, which has a significant effect over the final surface quality. In the current study, influence of overlap between the laser beam tracks on surface quality was experimentally investigated during the laser polishing of AISI H13 tool steel. Surface areas were polished by using four different overlap percentages (e.g. 80%, 90%, 95%, and 97.5%) while applying the same energy density. The improvement of surface quality was estimated through the analysis of line profiling surface roughness Ra, areal topography surface roughness Sa, and material ratio function. Also, individual components of the surface quality, e.g. waviness and roughness, and their evolution during LP were statistically analyzed using the power spectral density and the transfer functions. Finally, as an example of the best achieved LP result, flat surface area was polished using optimum set of the process parameters improving surface quality by 86.7% through the reduction of an areal topography surface roughness Sa from 1.35 μm to 0.18 μm.
Publication date
LanguageEnglish
AffiliationAutomotive and Surface Transportation; National Research Council Canada
Peer reviewedYes
IdentifierS1526612512000667
NPARC number21268787
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Record identifier00512689-bb0d-4f78-9757-fb6f86c0b94c
Record created2013-11-13
Record modified2016-05-09
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