Fig. 1. Schematics of laser.（a）Schematic of laser components；（b）schematic of optical path inside laser

Fig. 2. Diagram of specimen for testing mechanical properties

Fig. 3. Diagram of specimen for testing fatigue properties

Fig. 4. Macroscopic topographies of samples.（a）Parameter 1^#；（b）parameter 2^#；（c）parameter 3^#；（d）parameter 4^#；（e）parameter 5^#；（f）parameter 9^#

Fig. 5. Surface roughnesses of uncleaned sample and samples after laser cleaning under parameters 1^#-9^#

Fig. 6. Micro-morphologies of samples.（a）Uncleaned sample；（b）parameter 1^#；（c）parameter 2^#；（d）parameter 9^#

Fig. 7. SEM images of sample after laser cleaning under parameter 4^#.（a）Low magnification；（b）high magnification

Fig. 8. OM images of samples. (a) Uncleaned sample; (b) parameter 1^#; (c) parameter 9^#

Fig. 9. Surface temperatures of samples during cleaning

Fig. 10. Macro-hardnesses of uncleaned sample and samples after laser cleaning under parameters 1^#-9^#

Fig. 11. Microhardnesses of uncleaned sample and samples after laser cleaning under parameters 1^# and 9^#

Fig. 12. Tensile fracture sections of uncleaned sample and sample after laser cleaning.（a）Uncleaned sample；（b）sample after laser cleaning under parameter 2^#

Fig. 13. Fatigue fracture morphologies of blank sample, blank sample after laser cleaning, and coating sample after laser cleaning