Issue 50

N. Alexopoulos et alii, Frattura ed Integrità Strutturale, 50 (2019) 342-353; DOI: 10.3221/IGF-ESIS.50.29 346 (a) (b) (c) Figure 3: Typical tensile nominal stress - strain curves of AA2024-T3 after corrosion exposure for different exposure times to (a) EXCO solution, (b) 3.5 wt. % NaCl solution and (c) varying depth of artificial surface notches. (a) (b) (c) (d) (e) (f) Figure 4: Typical photographs of AA2024-T3 pre-corroded tensile specimens exposed to the EXCO solution (a)-(c) for 2 h, 4 h and 24 h, respectively and 3.5 wt. % NaCl solution (d)-(f) for 6 h, 168 h and 720 h, respectively. 0.00 0.05 0.10 0.15 0.20 0 100 200 300 400 500 Nominal axial strain ε [-] Aluminum alloy 2024-Τ3 t = 3.2 mm, L direction Exposure at EXCO solution Nominal axial stress σ [MPa] reference 0.5 hours 1 hour 2 hours 4 hours 12 hours 8 hours 24 hours stress drop 0.00 0.05 0.10 0.15 0.20 0 100 200 300 400 500 2184 hours Aluminum alloy 2024- T3 t= 3.20 mm, L direction Exposure at 3.5 % NaCl solution Nominal axial stress σ [MPa] Nominal axial strain ε [-] reference 6 hours 168 hours 720 hours 4200 hours 0.00 0.05 0.10 0.15 0.20 0 100 200 300 400 500 0.50 mm 0.30 mm 0.15 mm Nominal axial stress σ [MPa] Nominal axial strain ε [-] AA2024-T3 L, t = 3,2 mm with artificial surace-notches reference 0.10 mm