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J Kirschner, R. Gaschl, C. Eisenmenger-Sittner, J. Bernardi, C. Simson:
"Investigation of the Elemental Correlation in AlCuMgZn Multi Principal Element Alloys";
Vortrag: ÖGV-Seminar 2021, Seminar der Österreichischen Gesellschaft für Vakuumtechnik 2021, Wien; 24.09.2021.

Multi-Principal Element Alloys (MPEAs) show great potential as previous studies have shown that certain quaternary and quinary alloys were superior to conventional alloys. However, the prediction of compatible elements including light metals remains a major challenge.

Multi-component layers (10 µm) were co-deposited by magnetron sputtering and thereafter thermally treated to reveal the complex correlation between chemical composition, crystallography, mechanical properties and morphology. Quaternary systems including the elements Al, Mg, Zn and Cu in different compositions were deposited on a substrate. Scanning electron microscopy combined with energy dispersive X-ray spectroscopy and diffraction showed that the addition and increase of Cu have immense effects on the crystallographic phase formation. A wide concentration range in the Cu rich regime exhibited a single phase system, accompanied by significant indentation hardness and microstructural variations. The results were compared with the effects of the quantitative variation of the other constituents and the partial substitution with a 5th element (Si, Cr) to establish a better understanding of the correlation between different metals in a complex system.

Acknowledgements
This project has received funding by the Austrian Research Promotion Agency (FFG): Project PL2N_A, Grant No 865011