PSI - Issue 42

V.K. Yadav et al. / Procedia Structural Integrity 42 (2022) 594–601 V.K. Yadav et al., 2022/ Structural Integrity Procedia 00 (2019) 000 – 000

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The fracture surface of the CT-specimen after the crack growth tests were examined through SEM to understand the underlying damage mechanism, as shown in Fig 7. As observed that most of the features of the fatigue damage were similar in both the cases: without corrosion and with corrosion. The only difference was observed in the presence of oxides near the crack tip, which are responsible for crack arrest phenomena.

Fig. 6. Crack growth rate (da/dN) vs stress- intensity factor range (ΔK) of the welded AA2024 -T3 for with and without corrosion

Fig. 7. Fracture morphology of the broken specimen at each stress-ratios.