PT Journal
AU Kralik, R
   Bajtosova, L
   Kihoulou, B
   Krajnak, T
   Cieslar, M
TI The Influence of Solidification Route on As-cast Microstructures of Al-Cu-Li-Mg-Zr-Sc Alloy
SO Manufacturing Technology Journal
PY 2025
BP 626
EP 644
VL 25
IS 5
DI 10.21062/mft.2025.065
DE Al-Cu-Li-Mg-Zr-Sc; Mold casting; Twin-roll casting; Melt-spinning; Diffusionless solidification
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.
ER