Effect of creep ageing on the corrosion behaviour of an Al–Cu–Li alloy

Jiang, Bo; Wang, Chao; Song, Renguo; Li, Shichen; Cao, Fuhua; Yi, Danqing

doi:10.1016/j.corsci.2022.110314

Cited by 13 publications

(1 citation statement)

References 33 publications

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“…As depicted in figure 12(d), in peak aged sample after SHT, the corrosion mode was primarily IGC and the observed results were in concordance with TEM results. The corrosion potential of T 1 precipitates were found to be more negative in comparison to the matrix, with a value of −1.076 V/SCE for T 1 precipitates and −0.855 V/ SCE for the matrix in a 4% NaCl solution [46]. Furthermore, as evidenced in figure 3(a), SHT + peak aged specimens exhibited large T 1 precipitates at grain boundaries with PFZ formation.…”

Section: Corrosion Surface Morphologymentioning

confidence: 93%

On the microstructure, texture and electrochemical properties of severely deformed and artificially aged lightweight AA2050 Al–Cu–Li alloy

Jagadeesh,

et al. 2024

Mater. Res. Express

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Lightweight 3rd generation Al-Cu-Li alloy AA2050 was severely deformed via Multi Axial Forging (MAF) at 170C followed by artificial aging at 150C. Effect of MAF and post MAF aging on microstructure and precipitation was investigated using transmission electron microscopy (TEM). Formation of deformation bands and large dislocation cells were evident on MAF processed samples. Post MAF peak aging resulted in the distribution of fine T1 precipitates in grain interiors with reduction in grain boundary precipitation. Bulk texture studies reveal the formation of strong Goss and S texture components upon MAF processing. Further, low temperature artificial aging doesn’t exhibit significant changes in texture characteristics, either in terms of texture intensities or texture components. Polarization studies showed that peak aged samples exhibited better corrosion resistance compared to un-aged samples. Overall, 12 pass MAF processed and peak aged samples showed higher corrosion resistance. Further, corrosion surface morphologies examination revealed the change in corrosion mechanisms with thermomechanical treatments. Improved corrosion resistance after MAF and peak aging widens the requirements in aerospace and aircraft applications for such engineering alloys

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Section: Corrosion Surface Morphologymentioning

confidence: 93%