Infrared and Laser Engineering, Volume. 51, Issue 12, 20220143(2022)
Influence of different water-assisted methods on femtosecond laser layered-ring trepanning in superalloy
The effects of water-based and water film assisted methods on the hole quality of femtosecond laser layered-ring trepanning on superalloy was studied. The influence of the laser pulse repetition rate on the hole entrance/exit diameter, taper angle, hole sidewall morphology and hole sidewall roughness under different water assisted methods were compared and analyzed. The results shown that both water-based and water film assistance could improve the quality of femtosecond laser drilling, reduced the hole taper angle and the sidewall roughness, and the improvement effect of water-based assistance was more obvious. When the laser pulse energy was 80 μJ and the pulse repetition rate was 100 kHz, the quality of hole sidewall was better with water-based assistance, and the taper of the hole was reduced by 18.04% compared with that in air. With the increase of laser pulse repetition rate, the hole entrance/exit diameter and taper angle decreased firstly and then increased under the two water-assisted conditions, the changes of hole sidewall roughness were not obvious with water-based assistance, but the hole sidewall roughness with water film assistance increased continuously. The experimental results provided a reference for optimizing the water-assisted femtosecond laser drilling.
Get Citation
Copy Citation Text
Naifei Ren, Huayu Yang, Kaibo Xia. Influence of different water-assisted methods on femtosecond laser layered-ring trepanning in superalloy[J]. Infrared and Laser Engineering, 2022, 51(12): 20220143
Category: Lasers & Laser optics
Received: Mar. 3, 2022
Accepted: --
Published Online: Jan. 10, 2023
The Author Email: Xia Kaibo (xiakaibo@ujs.edu.cn)