Shunshan Wang, Hongchao Qiao, Zhihe Cao, Jinsheng Liang, Dongyu Han, Jibin Zhao. Experimental Research on Waterjet‑Guided Laser Processing of Microholes in Single Crystal Ni‑Based Superalloys[J]. Chinese Journal of Lasers, 2024, 51(16): 1602404
- Chinese Journal of Lasers
- Vol. 51, Issue 16, 1602404 (2024)
Fig. 1. WJGL processing system. (a) Schematic of test equipment; (b) schematic of laser-waterjet coupling system; (c) photograph of key components in processing system
Fig. 2. Schematics of scanning paths of WJGL spiral drilling. (a) Single-step spiral scanning mode; (b) multi-step spiral scanning mode
Fig. 3. Material removal mechanism of WJGL processing. (a) Before laser action ; (b) formation of molten pool and vapor; (c) generation of plasma plumes and shock waves ; (d) after laser action
Fig. 4. Optical microscope images of surface morphologies at entrances and exits of micro-holes under different single pulse energy values. (a1)‒(a5) Entrance; (b1)‒(b5) exit
Fig. 5. Size and taper of micro-hole versus single pulse energy
Fig. 6. Optical microscope images of surface morphologies at entrances and exits of micro-holes under different scanning speeds. (a1)‒(a5) Entrance; (b1)‒(b5) exit
Fig. 7. Size and taper of micro-hole versus scanning speed
Fig. 8. Optical microscope images of surface morphologies at entrances and exits of micro-holes under different feed times. (a1)‒(a5) Entrance; (b1)‒(b5) exit
Fig. 9. Size and taper of micro-hole versus feed time
Fig. 10. Optical microscope images of surface morphologies at entrances and exits of micro-holes under different scanning times. (a1)‒(a5) Entrance; (b1)‒(b5) exit
Fig. 11. Size and taper of micro-hole versus scanning time
Fig. 12. Optical microscope images of surface morphologies at entrances and exits of micro-holes processed by SSSM/MSSM. (a)(c) SSSM; (b)(d) MSSM
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Table 1. Nominal compositions of DD91 nickel-based single crystal superalloys
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Table 2. Comparison of MSSM/SSSM processing effects
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