Guolong Zhao, Hongjun Xia, Liang Li, Min Wang, Ning He. Nanosecond Pulsed Laser-Induced Controllable Oxidation of TiAl Intermetallic Alloys[J]. Chinese Journal of Lasers, 2021, 48(22): 2202021
- Chinese Journal of Lasers
- Vol. 48, Issue 22, 2202021 (2021)
Fig. 1. EDS spectrum of TiAl intermetallic alloys
Fig. 2. Laser-induced controllable oxidation assisted micro milling. (a) Schematic of hybrid machining process; (b) surface morphology of the material at the initial oxidation stage
Fig. 3. Schematic of the nanosecond pulsed laser-induced oxidation processing
Fig. 4. Schematic of the laser overlap rate
Fig. 5. Morphologies of the oxide layer for TiAl intermetallic alloys with different laser energy densities. (a) 6.86 J/cm2; (b) 7.84 J/cm2; (c) 8.82 J/cm2; (d) 9.80 J/cm2; (e) 10.78 J/cm2; (f) 11.76 J/cm2
Fig. 6. XRD patterns of the oxide layer under different laser energy densities
Fig. 7. Morphologies of the sub-layer for TiAl intermetallic alloys with different laser energy densities. (a) 6.86 J/cm2; (b) 7.84 J/cm2; (c) 8.82 J/cm2; (d) 9.80 J/cm2; (e) 10.78 J/cm2; (f) 11.76 J/cm2
Fig. 8. Thicknesses of the oxide layer and transition layer with different laser energy densities
Fig. 9. Morphologies of the oxide layer and transition layer with different laser scanning speeds
Fig. 10. Thicknesses of the oxide layer and transition layer with different laser scanning speeds
Fig. 11. Topographies of the oxide layer and transition layer under different assisted gas atmospheres
Fig. 12. Oxygen content of the oxide layer under different assisted gas atmospheres
Fig. 13. Thicknesses of the oxide layer and transition layer under different assisted gas atmospheres
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Table 1. Mechanical properties of TiAl intermetallic alloys[1]
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Table 2. Main parameters of ytterbium-doped pulsed fiber laser
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Table 3. Main laser machining parameters used in this work
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