Research Article
Effect of Microstructure on the Corrosion Fatigue Crack Growth of Low and Medium Steels
Table 5
The Paris equations of the corrosion fatigue curves of 15CrMo under two heat treatment states.
| | Heat treatment process | Microstructure | ΔK range () | C | n | Paris formula |
| | Full annealing | 90%ferrite + 10%pearlite | 12∼21 | 7.56 × 10−11 | 4.08 | da/dN = 7.56 × 10−11 × ΔK4.08 | | Normalizing | 60%ferrite + 40%pearlite | 17∼25 | 3.00 × 10−8 | 1.77 | da/dN = 3.00 × 10−8 × ΔK1.77 |
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