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Understanding the formation of (Al,Si)3Sc and V-phase (AlSc2Si2) in Al-Si-Sc alloys via ex situ heat treatments and in situ transmission electron microscopy studies

Dumbre, J.; Kairy, Shravan K; Anber, Elaf; Langan, Timothy; Taheri, Mitra L.; Dorin, T; Birbilis, Nick


Scandium (Sc) containing Al-Si model alloys were heat-treated at various temperatures to determine the interaction between Si and Sc. The (Al,Si)3Sc phase was formed at ~350 °C and V-phase (AlSc2Si2) was observed to form at above ~450 °C, as determined from x-ray diffraction and selected area electron diffraction. Hardening of the alloys was observed due to the formation of coherent, nanoscale (Al,Si)3Sc precipitates; whereas significant softening was observed upon the formation of coarse...[Show more]

CollectionsANU Research Publications
Date published: 2021
Type: Journal article
Source: Journal of Alloys and Compounds
DOI: 10.1016/j.jallcom.2020.158511


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