PSI - Issue 10

A. Karanika et al. / Procedia Structural Integrity 10 (2018) 66–72 A. Karanika et al. / Structural Integrity Procedia 00 (2018) 000 – 000

70

5

450

2024 T351 L direction 2060 T8E30 L Direction 2060 T8E30 LT Direction

300

150

MaxStress (MPa)

0

0.00E+00

5.00E+05

1.00E+06

1.50E+06

2.00E+06

Load Cycles

Fig. 4. S-N curve of 2060 T8E30 in comparison to the respective of 2024 T351.

3.2. Formability tests

Formability tests are essential to assure manufacturing soundness of the materials. To this end, samples out of AA2060-T8E30 sheets have been subjected in rolling experiments and for different rolling radius, as indicated in Table 3, while photos from the rolling procedure are depicted in Fig.5. No cracks were detected after the rolling process by visual and dye-penetrant inspection, even for the smallest rolling radius used.

Table 3. Rolling experiments of 2060-T8E30. Sample Id

Sample Dimensions (mm)

Radius (mm)

Cracks found by PT

1 2 3 4 5 6

250 x 890 250 x 890 250 x 890 100 x 890 100 x 890 100 x 890

500

0 0 0 0 0 0

1000 1500

200

85

125

Table 4. Bending normal to grain direction. Bending radius (mm)

2024-T8*

2060-T8E45

2024-T3*

2198-T3

SHEET Thickness (mm)

2.5

2.5

1.6

1.6

1.6 2.5 3.2 3.8

X X X X X X X

X

O.K. O.K. O.K. O.K. O.K.

X

X X X

X X X

5

7.65

O.K.

10

O.K.

17.5

O.K.