PSI - Issue 5

C. Barile et al. / Procedia Structural Integrity 5 (2017) 195–201 C. Barile/ Structural Integrity Procedia 00 (2017) 000 – 000

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3. Results and analysis

Before tensile tests, both weight and density were evaluated for all the specimens subjected to corrosion tests. Visual observations of the specimens not highlights substantially changes in surface. Tables 2, 3 and 4 show the results obtained. For each specimen only the mean value of three replications was indicated. The “As received” columns report both the starting weight and density values of all the specimen. As it is expected, higher laser powers correspond to higher density values.

Table 2. Loss mass evaluation group 1 specimens.

As received

NSS

Corrosion atmosphere [h]

Weight [g]

Density [g/cm 3 ]

Weight [g]

Density [g/cm 3 ]

1_1 1_2 1_3 1_4 1_5 1_6 1_7 1_8 1_9

17,03 17,01 17,31 17,05 17,44 17,03 16,95 17,28 17,26 17,15

7,88 7,87 7,89 7,91 7,88 7,92 7,88 7,85 7,86 7,88 0,02 7,37 7,40 6,57 7,25 7,08 7,22 7,45 7,32 6,97 7,18 0,28

0 h

17,01 17,30 17,03 17,43 17,02 16,96 17,27 17,24 17,16

7,88 7,92 7,94 7,92 7,93 7,76 7,88 7,90 7,89 0,06

24 h

96 h

168 h

240 h

MEAN VALUE

STD DEV

0,17

0,17

Table 3. Loss mass evaluation group 2 specimens.

As received

NSS

Corrosion atmosphere [h]

Weight [g]

Density [g/cm 3 ]

Weight [g]

Density [g/cm 3 ]

2_1 2_2 2_3 2_4 2_5 2_6 2_7 2_8 2_9

14,00 14,03 13,67 14,01 14,09 14,08 14,14 14,09 13,89 14,00

0 h

14,28 13,38 14,13 14,10 14,10 14,16 14,11 14,14 14,05

6,74 6,15 6,65 6,52 6,66 6,58 6,62 6,24 6,52 0,21

24 h

96 h

168 h

240 h

MEAN

STD DEV

0,14

0,28