Issue 42

M. Vasco et alii, Frattura ed Integrità Strutturale, 42 (2017) 9-22; DOI: 10.3221/IGF-ESIS.42.02

stress-strain curves of the as-received as well as the sandblasted steel bars after each corrosion exposure period, where Fig. 12a refers to 30 days of corrosion and Fig. 12b refers to 60 days of corrosion.

700

As received Sanblasted

600

As received_30d Sanblasted_30d As received_60d Sanblasted_60d

500

400

300

Stress (MPa)

200

100

0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0

Strain

Figure 11: Tensile load-displacement curves of as-received as well as sandblasted specimen at each corrosion exposure period.

(a) (b) Figure 12 : Tensile load-displacement curves of as-received as well as sandblasted specimen at 30 days of corrosion (a) as well as at 60 days of corrosion (b) . The degradation of yield and ultimate strengths of both materials is illustrated in Fig. 13. Almost the same degradation in the strength due to corrosion for both materials is observed. Uniform elongation and strain at break of both materials are illustrated in Fig. 14. A significant reduction of the strain at break after 30 days of corrosion exposure is observed for both materials, non-blasted and sandblasted. A further decrease of the strain at break after 60 days of corrosion exposure is shown in Fig. 14b. Slight differences are observed for the sandblasted material as compared to the as-received material; still, the results lie within the deviation range.

18