Microstructural Characteristics of Electron Beam Processed Al-2Sc
Plate samples of Al-2Sc were processed with an electron beam (EB) gun in a vacuum of 10-3 Pa at 50kV and 30 µA. EB processing suppressed the formation of primary Al3Sc, altered the morphology of the eutectic (Al)-Al3Sc, and increased the solubility of Sc in the eutectic (Al). In addition, its cyclic heating effect induced the precipitation of Al3Sc. EB processing resulted in more profound hardening than conventional high temperature solid solution and ageing.
Jian-Feng Nie and Allan Morton
D. Tomus et al., "Microstructural Characteristics of Electron Beam Processed Al-2Sc", Materials Science Forum, Vols. 654-656, pp. 910-913, 2010