Pulsed laser micro polishing (PLμP) has been shown to be an effective method of polishing micro metallic parts whose surface roughness can approach the feature size. Laser pulse duration in the PLμP process is an important parameter that significantly affects the achievable surface finish. This paper describes the influence of laser pulse duration on surface roughness reduction during PLμP. For this purpose, near-infrared laser pulses have been used to polish Ti6Al4V at three different pulse durations: 0.65 μs, 1.91 μs, and 3.60 μs. PLμP at longer pulse durations resulted in dominating Marangoni convective flows, yet significantly higher reductions in the average surface roughness were observed compared to the short pulse duration regime without convection.
Effects of Pulse Duration on Laser Micro Polishing
Contributed by the Manufacturing Engineering Division of ASME for publication in the JOURNAL OF MICRO AND NANO-MANUFACTURING. Manuscript received September 21, 2012; final manuscript received January 19, 2013; published online March 25, 2013. Assoc. Editor: Stefan Dimov.
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Vadali, M., Ma, C., Duffie, N. A., Li, X., and Pfefferkorn, F. E. (March 25, 2013). "Effects of Pulse Duration on Laser Micro Polishing." ASME. J. Micro Nano-Manuf. March 2013; 1(1): 011006. https://doi.org/10.1115/1.4023756
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