Issue 42

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

100 150 200 250 300 350 400 450 500 550 600 650 700 ULTIMATE STRENGTH (MPa)

100 150 200 250 300 350 400 450 500 550 600 650 700

NB SB

NB SB

YIELD STRENGTH (MPa)

0 50

0 50

0 DAYS

30 DAYS

60 DAYS

0 days

30 days

60 days

CORROSION TIME (b) Figure 13: Yield strength (a) and ultimate strength (b) of as-received as well as sandblasted specimen at each corrosion exposure period. (a) CORROSION TIME

100 150 200 250 300 350 400 450 500 550 600 650 700 ULTIMATE STRENGTH (MPa)

100 150 200 250 300 350 400 450 500 550 600 650 700

NB SB

NB SB

YIELD STRENGTH (MPa)

0 50

0 50

0 DAYS

30 DAYS

60 DAYS

0 days

30 days

60 days

CORROSION TIME (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. (a) CORROSION TIME

30 days

60 days

Difference (%)

Difference (%)

NB

SB

NB

SB

Average

513.27

487.81

479.80

473.75

Yield strength (MPa)

-4.96

-1.26

Deviation

5.71

7.78

4.53

7.47

Average

605.97

589.39

573.14

570.18

-2.74

-0.52

Ultimate strength (MPa) Uniform elongation (%)

Deviation

7.74

7.29

5.44 8.66 2.12

7.15 8.69 1.09

Average

10.47

10.72

2.33

0.35

Deviation

1.20

2.14

Average

15.99

16.80

15.36

15.95

5.06

3.85

Strain at break (%)

Deviation

0.79

1.89

1.03

2.26

Table 7 : Tensile results values and comparison.

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