Pulsed-CO2 laser-material interaction: thermomechanical effects

1993 ◽  
Author(s):  
Christophe Prat ◽  
Michel L. Autric ◽  
Georges Inglesakis
Keyword(s):  
Co2 Laser ◽  
Laser Material ◽  
Pulsed Co2 Laser ◽  
Material Interaction ◽  
Thermomechanical Effects

Pulsed CO2 laser-material interaction: mechanical coupling and reflected and scattered radiation

1991 ◽  
Author(s):  
Prat Christophe ◽  
Michel L. Autric ◽  
Georges Inglesakis ◽  
Dominique Astic
Keyword(s):  
Co2 Laser ◽  
Scattered Radiation ◽  
Laser Material ◽  
Mechanical Coupling ◽  
Pulsed Co2 Laser ◽  
Material Interaction

scholarly journals Investigation of Laser-material Interaction in Case of Aluminium Brazing Process

2018 ◽  
Author(s):  
Tamás Markovits ◽  
András Jászberényi
Keyword(s):  
Co2 Laser ◽  
Laser Heating ◽  
Laser Energy ◽  
Research Work ◽  
Base Material ◽  
Laser Source ◽  
Laser Material ◽  
Heating Source ◽  
Laser Absorption ◽  
Material Interaction

This research work is connected to the applicability of laser source in case of brazing of aluminium materials. Based on our earlier research results it become clear that the brazing flux material is able to improve the laser absorption in case CO2 laser source. A new brazing flux material (Fontargen F 400 MD EVO2) and the CO2 laser interactions were investigated to determine the applicability of laser as a heating source. The application of laser strongly depend on the value of absorption of laser energy into the aluminium base material. From our new result it can be seen that the applied flux can improve the laser absorption, thus the laser heating, but the implementation of brazing process with this flux material brings further challenges.

scholarly journals Simulation of the laser-material interaction of ultrashort pulse laser processing of silicon nitride workpieces and the key factors in the ablation process

2021 ◽  
Author(s):  
Babak Soltani ◽  
Faramarz Hojati ◽  
Amir Daneshi ◽  
Bahman Azarhoushang
Keyword(s):  
Mathematical Model ◽  
Laser Ablation ◽  
Pulse Laser ◽  
Ultrashort Pulse ◽  
Laser Processing ◽  
Laser Power ◽  
Removal Rate ◽  
Ultrashort Pulse Laser ◽  
Laser Material ◽  
Material Interaction

AbstractUnderstanding the laser ablation mechanism is highly essential to find the effect of different laser parameters on the quality of the laser ablation. A mathematical model was developed in the current investigation to calculate the material removal rate and ablation depth. Laser cuts were created on the workpiece with different laser scan speeds from 1 to 10 mm s−1 by an ultrashort pulse laser with a wavelength of about 1000 nm. The calculated depths of laser cuts were validated via practical experiments. The variation of the laser power intensity on the workpiece’s surface during laser radiation was also calculated. The mathematical model has determined the laser-material interaction mechanism for different laser intensities. The practical sublimation temperature and ablated material temperature during laser processing are other data that the model calculates. The results show that in laser power intensities (IL) higher than 1.5 × 109 W cm−2, the laser-material interaction is multiphoton ionisation with no effects of thermal reaction, while in lower values of IL, there are effects of thermal damages and HAZ adjacent to the laser cut. The angle of incidence is an essential factor in altering incident IL on the surface of the workpiece during laser processing, which changes with increasing depth of the laser cut.

Design and Development of a Pulsed CO2 Laser Rangefinder

1988 ◽  
Vol 17 (4) ◽  
pp. 91-93
Author(s):  
D. P. Juyal ◽  
N. K. Barthwal ◽  
A. L. Singh ◽  
S. P. Gupta ◽  
M. T. Rudrappa ◽  
...  
Keyword(s):  
Co2 Laser ◽  
Laser Rangefinder ◽  
Design And Development ◽  
Pulsed Co2 Laser

Studies of ion-acoustic wave properties by pulsed CO2 laser scattering

1979 ◽  
Vol 22 (1) ◽  
pp. 110 ◽  
Author(s):  
R. L. Watterson ◽  
A. L. Peratt ◽  
H. Derfler
Keyword(s):  
Acoustic Wave ◽  
Co2 Laser ◽  
Laser Scattering ◽  
Ion Acoustic Wave ◽  
Ion Acoustic ◽  
Pulsed Co2 Laser ◽  
Wave Properties

Negative ions generated by laser‐material interaction (invited)

1992 ◽  
Vol 63 (4) ◽  
pp. 2672-2675 ◽  
Author(s):  
G. Korschinek ◽  
T. Henkelmann
Keyword(s):  
Negative Ions ◽  
Laser Material ◽  
Material Interaction

Absorption of pulsed CO2 laser in silicon and resulting laser ablation and surface damage formation

1998 ◽  
Vol 1 (1) ◽  
pp. 23-28 ◽  
Author(s):  
Tetsuo Sakka ◽  
Satoshi Akiba ◽  
Akira Kuroyanagi ◽  
Kokichi Hotta ◽  
Yukio H. Ogata ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Co2 Laser ◽  
Surface Damage ◽  
Pulsed Co2 Laser

Active long pulse shaping technique of pulsed CO2 laser using multi-pulse discharge control

2004 ◽  
Vol 36 (1) ◽  
pp. 57-61 ◽  
Author(s):  
Yu-Soo Lee ◽  
Hyun-Ju Chung ◽  
Jong-Han Joung ◽  
Eung-Jo Kim ◽  
Hee-Je Kim
Keyword(s):  
Co2 Laser ◽  
Pulse Shaping ◽  
Pulse Discharge ◽  
Shaping Technique ◽  
Pulsed Co2 Laser ◽  
Long Pulse
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