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
- Infrared and Laser Engineering
- Vol. 51, Issue 12, 20220143 (2022)
Fig. 1. Schematic diagram of water-assisted femtosecond laser layered-ring trepanning system. (a) In air; (b) Water-based; (c) Water film
Fig. 2. Physical diagram of experimental device
Fig. 3. The morphology of the hole entrance/exit at different pulse repetition frequencies. (a) In air; (b) Water-based; (c) Water film
Fig. 4. Effect of laser pulse repetition rate on hole diameter. (a) Hole entrance; (b) Hole exit
Fig. 5. Hole sidewall morphology at different pulse repetition rates. (a) In air; (b) Water-based; (c) Water film
Fig. 6. Effect of laser pulse repetition rate on hole taper angle
Fig. 7. CLSM 3D morphology for different inwall locations of the hole at laser pulse repetition rate of 300 kHz. (a) In air; (b) Water-based; (c) Water film
Fig. 8. SEM observation for hole sections at laser pulse repetition rate of 300 kHz. (a) In air; (b) Water-based; (c) Water film
Fig. 9. Effect of laser pulse repetition rate on the hole sidewall roughness. (a) Hole entrance; (b) Hole middle; (c) Hole exit
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Table 1. Chemical composition of nickel-based superalloy GH4220
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Table 2. Specific parameters used in the experiment
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Table 3. Improvement of hole diameter and taper under different pulse repetition rates using two water-assisted methods compared with air conditions
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Table 4. Improvement of hole sidewall roughness under different pulse repetition rates using two water-assisted methods compared with air conditions
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