Issue 72

H.E. Lakache et alii, Frattura ed Integrità Strutturale, 72 (2025) 62-79; DOI: 10.3221/IGF-ESIS.72.06

the critical role of crack propagation and initiation mechanisms in determining the ultimate failure of the material, offering valuable insights into its fracture behavior under controlled deformation conditions.

f

Figure 17: a. Stamped L150 NPSM specimen subjected to the NAKAZIMA test, b-c. SEM micrographs showing localized necking, d. Material flow, e. magnified view of ductile deformation prior to fracture.

Figure 18: a. Post-failure crack morphology of L170 NPSM after the NAKAZIMA test, b-d. Magnified views of the propagated crack, e-g. Formation of new cracks.

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