Abstract
Nd: YAG laser has been a versatile tool for variety of material processing in the modern manufacturing industries. Apart from the easy manipulation and robustness of Nd: YAG laser beam, its wavelength absorbed by wide range of materials. Therefore, the possibility of controlling and precised values for prominent operating parameters such as average peak power, average peak power density (APPD), mean power, pulse duration, pulse energy, pulse repetition rate, interaction, pulse overlap theory and its mathematical relationships were discussed for pulsed and continuous wave. Hence, the selection of satisfactory combinations of associated parameters to produce efficient and effective material processing with reduced defects.
Highlights
Laser welding has received much attention as a promising joining technology because it encompasses high quality, precision, performance, and speed with good flexibility and low distortion
Nd: YAG laser beam can deliver via an optical fiber almost without loss, while transfer of a CO2 laser beam handled through an optical mirror system [2]
A common problem that has been faced by the manufactures during laser material processing is, there are more parameters to control of the process quality
Summary
Laser welding has received much attention as a promising joining technology because it encompasses high quality, precision, performance, and speed with good flexibility and low distortion. It allows robotic linkages, reduced work force, full automation, and systematization. In comparison of Nd: YAG laser and CO2 laser, wavelength, 10.6 μm in case of a CO2 laser and 1.06 μm for Nd: YAG laser beam This means a difference in absorption of the laser beam by the materials. The present paper is to discuss about the selection and précised application of the prominent operating parameters for various laser-assisted material processing using Nd: YAG laser. Where Pp is average peak power (W), PD is average peak power density (APPD) (W/mm2), PM is mean power (W), TP is the pulse duration (mS), EP is the pulse energy (J), PRR is the pulse repetition rate (s-1), TF the pulse to-pulse time (mS), and CD (duty cycle)=TP/TF
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