Fig. 1. Vibration sample size and laser peening area

Fig. 2. CLP test system. (a) Schematic; (b) experimental device

Fig. 3. Microstructures of specimen at different treatment methods. (a)(b) RT-LP; (c)(d) CLP

Fig. 4. TEM photos of specimen surface treated by CLP

Fig. 5. First-order damping ratio of specimens treated by different modes

Fig. 6. Fatigue life of vibration specimens treated by different modes

Fig. 7. Fracture morphology of vibration fatigue crack propagation zone. (a) Untreated specimen; (b) RT-LP specimen; (c) CLP specimen

Fig. 8. Instantaneous zone morphology of different specimens. (a) Untreated sample; (b) RT-LP specimen; (c) CLP specimen