Research Article
Research on Fatigue Damage of Compressor Blade Steel KMN-I Using Nonlinear Ultrasonic Testing
Table 4
Statistics of the cracks in the specimens.
| Fatigue cycles | | | | | | | |
| Number of cracks | 0 | 0 | 1 | 3 | 4 | 6 | 12 | Length of cracks | 0 | 0 | 8 | 12, 6, 7 | 18, 8, 4, 26 | 30, 12, 25, 10, 14, 16 | 9, 7, 31, 13, 8, 11, 25, 58, 5, 11, 12 | Equivalent crack length | 0 | 0 | 8 | 25 | 56 | 107 | 181 |
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