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.
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March 2013
Research-Article
Effects of Pulse Duration on Laser Micro Polishing
Madhu Vadali,
Madhu Vadali
Graduate Research Assistant
e-mail: vadali@wisc.edu
e-mail: vadali@wisc.edu
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Chao Ma,
Frank E. Pfefferkorn
Frank E. Pfefferkorn
1
Associate Professor
Mem. ASME
e-mail: pfefferk@engr.wisc.edu
Mechanical Engineering Department,
Madison, WI 53706
Mem. ASME
e-mail: pfefferk@engr.wisc.edu
Mechanical Engineering Department,
University of Wisconsin–Madison
,Madison, WI 53706
1Corresponding author.
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Madhu Vadali
Graduate Research Assistant
e-mail: vadali@wisc.edu
e-mail: vadali@wisc.edu
Chao Ma
Graduate Research Assistant
e-mail: cma25@wisc.edu
e-mail: cma25@wisc.edu
Neil A. Duffie
Xiaochun Li
Frank E. Pfefferkorn
Associate Professor
Mem. ASME
e-mail: pfefferk@engr.wisc.edu
Mechanical Engineering Department,
Madison, WI 53706
Mem. ASME
e-mail: pfefferk@engr.wisc.edu
Mechanical Engineering Department,
University of Wisconsin–Madison
,Madison, WI 53706
1Corresponding author.
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.
J. Micro Nano-Manuf. Mar 2013, 1(1): 011006 (9 pages)
Published Online: March 25, 2013
Article history
Received:
September 21, 2012
Revision Received:
January 19, 2013
Citation
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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