PSI - Issue 2_A

Nikolaos D. Alexopoulos et al. / Procedia Structural Integrity 2 (2016) 3782–3783

3783

results of yield stress as well as elongation at fracture for the case of AA2024 can be seen in the diagrams of Figure 1. The effect of artificial aging on the fracture toughness is also assessed for both alloys. Although the peak-aged temper of AA2198 is of application interest, a detailed investigation of the structure–property relationships of other temper states is attempted since it provides the basis for understanding the influence of process-induced microstructural changes on the post-processing properties of the alloy. To this end, structural characterization as well as relationship between yield stress, elongation at fracture and fracture toughness is reported and discussed in the manuscript for all investigated aging conditions.

10 12 14 16 18 20

500

Aluminumalloy 2024-T3 Literature data from ASMHandbook ( R p )

experiments at 170 o C experiments at 190 o C experiments at 210 o C

a.a. at 175 o C a.a. at 190 o C a.a. at 205 o C

450

Elongation at fracture A f [%]

350 Yield stress R p0.2% [MPa] 400

Aluminumalloy 2024-T3 Literature data from ASMHandbook ( A f )

0 6 8

a.a. at 175 o C a.a. at 190 o C a.a. at 205 o C

experiments at 170 o C experiments at 190 o C experiments at 210 o C

0

0,01

0,1

1

10

100 1000

0,01

0,1

1

10

100 1000

Artificial ageing time [hours]

Artificial ageing time [hours]

(a) (b) Figure 1: (a) Yield stress and (b) elongation at fracture values for the different artificial ageing conditions of AA2024. REFERENCES [1] R.J. Rioja, J. Liu, Metall. Mater. Trans. A43 (2012) 3325-37. [2] J.W. Martin, Ann. Rev. Mater. Sci. 18 (1988) 101-19. [3] P. Donnadieu, Y. Shao, F. De Geuser, G.A. Botton, S. Lazar, M. Cheynet, M. De Boissieu, A. Deschamps, Acta Mater. 59 (2011) 462-72. [4] J. Chen, Y. Madi, T.F. Morgeneyer, J. Besson, Comp Mater Sci 50 (2011) 1365-71.

[5] D. Steglich, H. Wafai, J. Besson, Eng. Fract. Mech. 77 (2010) 3501-18. [6] D. Steglich, H. Wafai, J. Besson, Int. J. Damage Mech. 19 (2010) 131-52. [7] H. Ovri, E. Jägle, A.Stark, E.T. Lilleodden, Mater. Sci. Eng A A637 (2015) 162-9.