Application of picosecond laser for polishing of AISI H13 tool steel sample prepared by micro milling

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TypeArticle
Proceedings title41st North American Manufacturing Research Conference 2013
Series titleTransactions of the North American Manufacturing Research Institution of SME; no. Volume 41
Conference41st North American Manufacturing Research Conference 2013, June 10-14 2013, Madison, WI, USA
ISSN1047-3025
ISBN9781627486972
Pages239248
AbstractThis paper explores the applicability of picosecond laser (ps) in laser micro polishing (LμP) of AISI H13 tool steel. The melting regime associated with this process was determined experimentally through the variation of the focal offset in order to attain a desired fluence level. To ensure the consistency and certainty of initial surface geometry, the surface was prepared through a micro milling operation with a step-over of 50 μm and scallop height of 2 μm. The LμP experiments were performed at 5 different fluence levels of the melting regime obtained through setting of the focal point at 5 different distances. The polishing performance was evaluated based on the distribution of line profiling average surface roughness (Ra) at various spatial wavelength intervals. Additional statistical metrics such as material ratio function and power spectral density function were also determined in order to establish the process parameters associated with best achievable surface finish. Finally, as a demonstration of the applicability of ps LμP process, a flat micro milled area was polished using optimum process parameters. This operation yielded in 68% surface quality improvement as quantified through the reduction of the areal topography surface roughness (Sa) from 0.53 urn to 0.17 μm.
Publication date
PublisherSociety of Manufacturing Engineers
LanguageEnglish
AffiliationNational Research Council Canada; Automotive and Surface Transportation
Peer reviewedYes
NPARC number23000478
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Record identifier9001f7ff-199e-4d54-809c-297cb357fef9
Record created2016-07-22
Record modified2016-07-22
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