Issue 50

Ch. Apostolopoulos et alii, Frattura ed Integrità Strutturale, 50 (2019) 548-559; DOI: 10.3221/IGF-ESIS.50.46 556 Figs.9 and 10 illustrate the SEM and EDX analyses in a corroded B400C, Φ16 sample, after tensile test. Moreover, through X rays’ diffusion, the appearance of pores was obvious at the external martensitic surface and at the same area high sulfide concentration was noticed. This fact increased the requirements for damage expansion at the inner area of the external surface (skin). Fig.11, which has been taken from study [26], that processes on the same rebar group, presents a SEM analysis of a longitudinal cut in the fracture region in a non - corroded B450c specimen after tensile test. Figure 9 : SEM analysis in a corroded B400C, Φ16 sample, after tensile test. 0 1 2 3 4 5 6 7 8 keV 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 cps/eV Fe Fe Mn Mn Si S 1.00 * Acquisition 8964 1.00 * Acquisition 8963 Figure 10 : EDX analysis in a corroded B400C, Φ16 sample, after tensile test. Figure 11 : Fracture surface (longitudinal cross section) of a non corroded specimen B450c [26].