13th International Conference on Fracture June 16–21, 2013, Beijing, China -8- 10 -9 2 4 6 10 -8 2 4 6 10 -7 2 4 6 10 -6 25 30 35 40 20 15 10 before after standard 10 -9 2 4 6 10 -8 2 4 6 10 -7 2 4 6 10 -6 25 30 35 40 20 15 10 Standard 1 Standard 2 Stress intensity factor range, K MPa･m1/2 Crack growth rate, da/dN m/cycle Figure 10. Fatigue crack growth rate as a function of stress intensity range with Standard specimens without the application of the electric current Crack growth rate, da/dN m/cycle mm/cycle Figure 11. Fatigue crack growth rate as a function of the crack length before the application and after the application of the electric current in Specimen B 2.99 9 4.83 10 da K dN Stress intensity factor range, K MPa･m1/2
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