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Mechanisms of Laser Processing in Water and Air(PDF)


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Mechanisms of Laser Processing in Water and Air
CHEN Xiao 1XU Rong qing 1SHEN Zhong hua 12 LU Jian 1NI Xiao wu 1
1.School of Sciences,NUST,Nanjing 210094,China;2.Institute of Acoustics, Nanjing University, Nanjing 210093,China
laser-induced mechanical effect ablation liquid-jet impact pressure sensor
In view of the laser-processing ef ficiency in different media, the mechanisms of pulsed laser processing in air and w ater is analyzed on the ex perimental results of the processing ef fect and pressure detect ion. The result s show that material processed in w ater are impacted by both the laser-induced ablat ion and liquid-jet pressure due to the bubble collapse. Both are in MPa order. T he target in air is only acted by the ablation force that is 4. 5 t imes lower than that in w ater. The ef ficiency of laser processing in w ater is proved higher than that in air.


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Last Update: 2013-03-11