YAG laser percussion drilling of a functional multi-layer thin plate |
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Authors: | AH Wang WY Wang ZK Bai CS Xie DW Zeng WL Song |
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Institution: | aState Key Lab of Plastic Forming Simulation and Die and Mould Technology, Department of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China;bInstitute of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, PR China |
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Abstract: | An Au-coated Fe–Ni alloy thin plate was laser drilled by a pulsed Nd:YAG laser. The influences of laser parameters on the diameter of perforation, the outer diameter of crater and the roundness of the perforation have been investigated by employing scanning electron microscopy. The diameter of perforation increases gradually with an increase in pulse width from 0.3 to 8 ms at the fixed average laser power and frequency, and increases with an increase in average laser power from 10 to 25 W at the fixed pulse width and frequency. Some craters are found around the perforations because of the heat affecting of laser beam to the non-irradiated zone. The diametric difference of the perforation between the incident and the effluent sides is very small under the shortest pulse width of 0.3 ms. Good roundness of the perforation can be achieved at either the lowest pulse width or the lowest laser power. |
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Keywords: | YAG laser drilling Au-coated Fe– Ni plate Perforation |
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