Influence of corrosion and creep on intergranular fatigue crack path in 2XXX aluminium alloys

Gilbert Hénaff (1) , Frédéric Menan (1) , Grégory Odemer (1)

1 PPrime [Poitiers] - Institut Pprime [UPR 3346]

In this paper, two examples of the influence of time-dependent processes on crack path in two 2XXX aluminium alloys are presented. The first example is concerned with corrosion-fatigue crack growth resistance of a 2024 T351 alloy cracked in the S-L direction in 3.5% NaCl solution at free corrosion potential. The second example deals with the elevated temperature crack growth resistance of a 2650 T6 alloy that might be used in future supersonic aircraft fuselage panels. The common idea is to correlate quantitative measurements of relevant fractographic features of crack path to the effects of time-dependent processes on crack growth rates.

Mots clés: Aluminium alloy; Corrosion-fatigue; Creep-fatigue; Hydrogen embrittlement; Cavitation

Domaines: Mécanique des matériaux [physics.class-ph]; Mécanique des matériaux [physics.class-ph]; Matériaux

Gilbert Hénaff, Frédéric Menan, Grégory Odemer. Influence of corrosion and creep on intergranular fatigue crack path in 2XXX aluminium alloys. Engineering Fracture Mechanics, 2010, vol. 77, pp. 1975-1988. ⟨10.1016/j.engfracmech.2010.03.039⟩. ⟨hal-00905865⟩