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Characteristics of the Femto-second Pulsed Laser Ablation according to Feed Velocity on the Invar Alloy  

Chung, Il-Young (Department of Mechanical Engineering, Inha Univ.)
Kang, Kyung-Ho (Department of Mechanical Engineering, Inha Univ.)
Kim, Jae-Do (Department of Mechanical Engineering, Inha Univ.)
Sohn, Ik-Bu (Advanced Photonics Research Institute, GIST)
Noh, Young-Chul (Advanced Photonics Research Institute, GIST)
Lee, Jong-Min (Advanced Photonics Research Institute, GIST)
Publication Information
Journal of the Korean Society for Precision Engineering / v.26, no.3, 2009 , pp. 25-31 More about this Journal
Abstract
Femto-second laser ablation with the various feed velocities of the Invar alloy and the micro surface milling for the processing condition were studied. We used a regenerative amplified Ti:sapphire laser with a 1kHz repetition rate, 184fs pulse duration time and 785nm wavelength. Femto-second laser pulse was irradiated on the Invar alloy with the air blowing at the condition of various laser peak powers and feed velocities. An ablation characteristic according to feed velocity of the Invar alloy was appeared as the non-linear type at different zone of energy fluence. The micro surface milling of the Invar alloy using a mapping method was investigated. The optimal condition of micro surface milling was laser peak power of 22.8mW, feed velocity of 1 mm/s, beam gap of $1{\mu}m$. With the optimal processing condition, the fine rectangular shape without burr and thermal damage was achieved. Using the femto-second laser system, it demonstrates excellent tool for micro surface milling of the Invar alloy without heat effects and poor edge.
Keywords
Femto-second Laser; Ablation; Invar Alloy; Feed Velocity; Surface Milling; Mapping Method;
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Times Cited By KSCI : 2  (Citation Analysis)
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