Experimental Research on Waterjet‑Guided Laser Processing of Microholes in Single Crystal Ni‑Based Superalloys

Shunshan Wang; Hongchao Qiao; Zhihe Cao; Jinsheng Liang; Dongyu Han; Jibin Zhao

doi:10.3788/CJL231117

Chinese Journal of Lasers, Volume. 51, Issue 16, 1602404(2024)

Experimental Research on Waterjet‑Guided Laser Processing of Microholes in Single Crystal Ni‑Based Superalloys

Shunshan Wang^1,2,3, Hongchao Qiao^1,2、*, Zhihe Cao^1,2, Jinsheng Liang^1,2,3, Dongyu Han^1,2, and Jibin Zhao^1,2

¹State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China

²Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110169, Liaoning, China

³University of Chinese Academy of Sciences, Beijing 100049, China

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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

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Fig. 2. Schematics of scanning paths of WJGL spiral drilling. (a) Single-step spiral scanning mode; (b) multi-step spiral scanning mode

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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

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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

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Fig. 5. Size and taper of micro-hole versus single pulse energy

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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

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Fig. 7. Size and taper of micro-hole versus scanning speed

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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

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Fig. 9. Size and taper of micro-hole versus feed time

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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

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Fig. 11. Size and taper of micro-hole versus scanning time

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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 1. Nominal compositions of DD91 nickel-based single crystal superalloys
Element Al Cr Co Mo Ta W Re Ru Ni
Mass fraction /% 6 5 12 1 8 6 5 3 Bal.

Table 2. Comparison of MSSM/SSSM processing effects
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Table 2. Comparison of MSSM/SSSM processing effects
Method Diameter /μm Roundness /μm Taper /（°）
Entrance Exit Entrance Exit
MSSM 1015 1005 15 16 0.29
SSSM 1032 998 20 27 0.97

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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

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