Issue 51

D. Fernandino et alii, Frattura ed Integrità Strutturale, 51 (2020) 477-485; DOI: 10.3221/IGF-ESIS.51.36 482 Figure 6: Sequence of metallographic observation of the micro-scale damage evolution during the step by step procedure at different engineering strains (  eng ሻ . I-Optical micrographies, II-SEM images. (a)  eng = 0.04, (b)  eng = 0.2, (c)  eng = 0.5, (d)  eng = 0.10, (e)  eng = 0.14, (f)  eng = 0.152. Magnifications of different areas of the fracture surfaces in Fig. 8a are presented in Fig. 8b,c and d. A detail of a quasi- cleavage facet is shown in Fig. 8d. It is important to note the tearing between the cleavage facets. These tearing is a result