Research Article
Research on Fatigue Damage in High-Strength Steel (FV520B) Using Nonlinear Ultrasonic Testing
Figure 16
Microstructure of notched specimens (660 MPa stress concentration). (a) Microstructure of 8.00 × 104 cycles. (b) Microstructure of 9.50 × 104 cycles. (c) Microstructure of 1.00 × 105 cycles.
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