Fig. 1. Surface morphologies of TA15 titanium alloy before and after laser cleaning. (a) Cleaned surface morphology and original surface morphology; (b) SEM image of original surface

Fig. 2. Laser cleaning schematic

Fig. 3. Scanning path of laser spot

Fig. 4. Surface morphologies of TA15 after laser cleaning. (a) V=7000 mm·s^-1; (b) V=8000 mm·s^-1; (c) V=9000 mm·s^-1; (d) V=10000 mm·s^-1

Fig. 5. SEM morphologies of TA15 surface after laser cleaning. (a) V=7000 mm·s^-1; (b) V=8000 mm·s^-1; (c) V=9000 mm·s^-1; (d) V=10000 mm·s^-1

Fig. 6. Schematic of laser removal of oxide layer and oil pollution on TA15 surface

Fig. 7. EDS patterns and EDS analysis of TA15 surface after laser cleaning. (a) V=7000 mm·s^-1; (b) V=8000 mm·s^-1; (c) V=9000 mm·s^-1; (d) V=10000 mm·s^-1

Fig. 8. XRD spectra of TA15 surface after laser cleaning

Fig. 9. Hardness chart of TA15 surface after laser cleaning