Issue 13

F. Iacoviello et alii, Frattura ed Integrità Strutturale, 13 (2010) 3-16; DOI: 10.3221/IGF-ESIS.13.01 13 Figure 52 : Ferritic DCI (R = 0.1,  K = 15 MPa√m). Figure 53 : Ferritic DCI (R = 0.5,  K = 15 MPa√m). Figure 54 : Ferritic DCI (R = 0.5,  K = 10 MPa√m). Figure 55 : Pearlitic DCI (R = 0.1,  K = 10 MPa√m). Figure 56 : Pearlitic DCI (R = 0.1,  K = 15 MPa√m). Figure 57 : Pearlitic DCI (R = 0.1,  K = 20 MPa√m). Figure 58 : Ferritic-pearlitic DCI (R = 0.5,  K = 9 MPa√m). Figure 59 : Ferritic-pearlitic DCI (R = 0.1,  K = 15 MPa√m). Figure 60 : Ferritic-pearlitic DCI (R = 0.1,  K = 20 MPa√m). Figure 61 : Ferritic-pearlitic DCI (annealed pearlitic DCI) (R = 0.1,  K = 10 MPa√m). Figure 62 : Ferritic-pearlitic DCI (annealed pearlitic DCI) (R = 0.1,  K = 15 MPa√m). Figure 63 : Ferritic-pearlitic DCI (annealed pearlitic DCI) (R = 0.1,  K = 20 MPa√m). Also austempered DCI crack profile is characterized by the presence of sound and partially disintegrated graphite nodules (Fig. 64, 65 and 66) . Around graphite nodule is evident a ferritic shield: its morphology is quite different from GJS500-7 DCI, but it is always evident.