RT Journal Article
SR Electronic
A1 Králík, Rostislav
A1 Bajtošová, Lucia
A1 Kihoulou, Barbora
A1 Krajňák, Tomáš
A1 Cieslar, Miroslav
T1 The Influence of Solidification Route on As-cast Microstructures of Al-Cu-Li-Mg-Zr-Sc Alloy
JF Manufacturing Technology Journal
YR 2025
VO 25
IS 5
SP 626
OP 644
DO 10.21062/mft.2025.065
UL https://journalmt.com/artkey/mft-202505-0005.php
AB The influence of the casting method on the microstructures of Al-Cu-Li-Mg-Zr-Sc was examined. The techniques include mold casting, twin-roll casting, and melt spinning. Estimated solidification rates up to 107 K.s-1 produce dendritic solidification with eutectic cells ranging from 500 nm to 50 μm, decorated by primary phase particles with thicknesses from 200 nm to 3 μm. Exceeding this solidification rate results in near-diffusionless solidification, which traps more solutes in the matrix. This type of solidification yields a more supersaturated material with nearly 90% of the total Cu content in the matrix and a fine dispersion of nanoscale spherical precipitates below 100 nm in diameter. The small addition of Sc during casting primarily affects the material at low cooling rates, where primary Sc-containing particles modify the grain boundary shape.