The Li stance on precipitation in Al–Li-based alloys: an investigation by X-ray Raman spectroscopy

Benedikt Klobes, Danny Petschke, Frank Lotter, Vasily Potapkin, Torsten Staab
2022 Journal of materials science 57(11)  
Decomposition and precipitation processes in a binary Al–Li alloy and a technical Al–Li–Cu–Mg alloy were investigated using differential scanning calorimetry and X-ray Raman spectroscopy (XRS). The formation of 𝛿' and T1 precipitates in the Al–Li and the T8 heat-treated Al–Li–Cu–Mg alloy, respectively, was confirmed using DSC. The XRS measurements complemented by simulated spectra allowed for probing specifically Li and its environment within the Al matrix. Based on linear combination fits of
more » ... e XRS spectra, the relative contributions of 𝛿′ and T1 precipitates were quantified. These results are in agreement with estimates of the relative amount of Li taking part in the precipitation process. Difficulties and limitations of the application of XRS to Al alloy systems are also discussed.
doi:10.3204/pubdb-2022-01700 fatcat:egsm5bcxlnba3omkufusutukbq