13th International Conference on Fracture June 16–21, 2013, Beijing, China -7- The results show that the variability of the ratio FIPband/FIPgrain decreases both towards larger FIPs and the center of the grain. Therefore, the average of the FIP over the entire grain closely mimics the FIP computed at the center cross section of the grain for large values of FIPs. 3.1 Grain size effects Grain size effects on fatigue crack formation and early transgranular growth have been modeled by Figure 5. Distributions of the ratio between FIPband and FIPgrain, classified by region they occupy in the grain (rows) and the intensity of the FIPband and FIPgrain (columns).
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