The effect of overlap percentage on surface quality in laser polishing of AISI H13 tool steel

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Proceedings title40th North American Manufacturing Research Conference 2012: Notre Dame, Indiana, USA, 4-8 June 2012.
Transactions of the North American Manufacturing Research Institution of SME
Conference40th Annual North American Manufacturing Research Conference, NAMRC40, June 4-8, 2012, Notre Dame, IN, USA
Pages351360; # of pages: 10
SubjectAISI H13; Energy density; Laser polishing; Overlap percentage; Surface waviness; Industrial research; Lasers; Manufacture; Polishing; Surface roughness; Tool steel; Transfer functions; Surface properties
AbstractPolishing by laser beam radiation is a novel technique used to modify the initial surface geometry in order to achieve a desired level of surface finish. The performance of laser polishing (LP) is determined by its process parameters, whose optimum combination is essential for the achievement of the best possible surface quality. In this regard, the overlap percentage is one of the important LP settings, which indicates the level of the overlap between two consecutive polishing tracks. In the current study, the effects of overlap percentage were experimentally investigated in the context of AISI H13 tool steel LP operations. Four surface areas were polished using four different overlap percentages but the same applied energy density. The improvement of surface quality was measured by average spatial surface roughness and material ratio function. The surface quality improvement was also analyzed by means of statistical analysis using the autospectrum and the transfer functions. Finally, the polished area created by the optimum overlap from the aforementioned analyses was further processed by an additional level of LP improving a total average surface roughness from 1.59 μm to 0.18 μm (89% improvement).
Publication date
AffiliationNational Research Council Canada; Automotive
Peer reviewedYes
NPARC number21270208
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Record identifier8e6fb0ab-42f5-4be4-afe5-8d67db40781d
Record created2014-01-10
Record modified2016-05-09
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