Issue 42

M. Vasco et alii, Frattura ed Integrità Strutturale, 42 (2017) 9-22; DOI: 10.3221/IGF-ESIS.42.02 19 0 days 30 days 60 days 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 NB SB YIELD STRENGTH (MPa) CORROSION TIME (a) 0 DAYS 30 DAYS 60 DAYS 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 ULTIMATE STRENGTH (MPa) CORROSION TIME NB SB (b) Figure 13: Yield strength (a) and ultimate strength (b) of as-received as well as sandblasted specimen at each corrosion exposure period. 0 days 30 days 60 days 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 NB SB YIELD STRENGTH (MPa) CORROSION TIME (a) 0 DAYS 30 DAYS 60 DAYS 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 ULTIMATE STRENGTH (MPa) CORROSION TIME NB SB (b) Figure 14: Uniform elongation (a) and strain at break (b) of as-received as well as sandblasted specimen at each corrosion exposure period. The obtained values of the tensile properties are presented in Tab. 7. Moreover, a comparison has been made to reveal the differences of the sandblasted material as compared to the as-received one. The values highlighted by red color indicate a reduction, while green color indicates an increase of the corresponding property. 30 days 60 days NB SB Difference (%) NB SB Difference (%) Yield strength (MPa) Average 513.27 487.81 -4.96 479.80 473.75 -1.26 Deviation 5.71 7.78 4.53 7.47 Ultimate strength (MPa) Average 605.97 589.39 -2.74 573.14 570.18 -0.52 Deviation 7.74 7.29 5.44 7.15 Uniform elongation (%) Average 10.47 10.72 2.33 8.66 8.69 0.35 Deviation 1.20 2.14 2.12 1.09 Strain at break (%) Average 15.99 16.80 5.06 15.36 15.95 3.85 Deviation 0.79 1.89 1.03 2.26 Table 7 : Tensile results values and comparison.