Characterization of fatigue behavior of Al-Li alloy 2099

Cisko, A. R.; Jordon, J.B.; Avery, D. Z.; McClelland, Z.; Liu, T.; Rushing, Timothy W.; Brewer, Luke N.; Allison, P. G.; Garcia, Lyan I.

doi:10.1016/j.matchar.2019.03.026

Cited by 15 publications

(1 citation statement)

References 34 publications

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“…Accordingly, the dotted crack source region was distributed at the bottom of the corroded hole. The propagation zone displayed radial river-like patterns on the fracture surface, and some slider secondary cracks were vertical to the crack growth direction [38,39]. Those cracks seemed to be intergranular along the sliver GBs.…”

Section: Crack Propagation Analysis In 3dmentioning

confidence: 99%

Fatigue Crack Propagation Behavior of the 2195-T8 Aluminum-Lithium Alloy with a Precorroded Hole

Liu

Tian

et al. 2022

International Journal of Aerospace Engineering

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This work investigated the fatigue crack propagation behavior of the 2195-T8 Al-Li alloy with precorroded holes. The microstructure, crack growth path, and the fracture surfaces of the samples with the precorroded holes have been examined with scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and computed tomography (CT). The characteristics of the crack growth have been analyzed via fracture mechanics by employing the finite element method (FEM). The results showed that the bulk of the fatigue cracks had been initiated from the corrosion pits and corroded discontinuously and precipitated further to become intergranular. Owing to the superposed stress concentration caused by the corrosion pits, the porous region at the bottom of the precorroded hole had affected the crack propagation performance. Crack growth rates were different in multiple positions owing to the difference of K I at crack fronts.

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Section: Crack Propagation Analysis In 3dmentioning

confidence: 99%