PSI - Issue 18

Fokion Oikonomidis et al. / Procedia Structural Integrity 18 (2019) 142–162 Dr Fokion Oikonomidis / Structural Integrity Procedia 00 (2019) 000 – 000

18

159

Fatigue pre-crack

Extension during test

Cleavage

Fig. 24. SEM image of the region of crack extension (quasi-cleavage) during the test. Magnification indicated by the scale marker.

Fig. 25. SEM image of the region of crack extension (quasi-cleavage) during test indicating that the extension may have occurred in two steps. Magnification indicated by the scale marker.