Journal
APPLIED SURFACE SCIENCE
Volume 256, Issue 5, Pages 1514-1520Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2009.09.013
Keywords
Laser micromachining; Metals and alloys
Categories
Funding
- North West Development Agency(NWDA)
- UK/China Postgraduate Research Scholarships for Excellence
- China Scholarship Council
Ask authors/readers for more resources
180 femtoseconds (1 kHz) and 10 picoseconds (1-50 kHz) ultrafast laser micro-structuring of the metals Ti alloy, Al and Cu have been studied for the purpose of industrial application. The effects of some key laser operating parameters were investigated. The evolution of surface morphology revealed that laser pulses overlap in a range around the spatial FWHM can help to achieve optimal residual surface roughness. While observed ablation rate (unit: mu m(3) per pulse) changed dramatically with repetition rate due to the combined effects of plasma absorption, residual thermal energy and phase transition, higher throughput can be achieved with higher repetition rate. This study also indicated that residual surface roughness is almost independent of repetition rate at 10 ps temporal pulse length. The ablation depth is approximately proportional to the number of overscan; however, machining accuracy deteriorates, especially for femtosecond laser processing and metals with low thermal conductivity and short electron-phonon coupling time. (C) 2009 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available