Issue 51

D. Fernandino et alii, Frattura ed Integrità Strutturale, 51 (2020) 477-485; DOI: 10.3221/IGF-ESIS.51.36 483 of the quasi-cleavage fracture mechanism itself, where the fracture initiates along the cleavage facets and is followed by plastic strain of the remaining ligament. This is the main difference with a classical cleavage facet, in which the fracture process is characterized by the separation of the cleavage planes through its edges [18]. Figure 7: Optical micrography showing a crack initiation at a ferritic grain boundary. Engineering strains,  eng = 0.10. Figure 8: Fracture surface of the small tensile sample resulting from the quasi-static loading condition. Different magnifications.