Monodisperse Al3(LiScZr) core/shell precipitates in Al alloys
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2022, Journal of Materials Research and TechnologyCitation Excerpt :According to reference [34,35] and STEM map-scanning images, the precipitation sequence is Sc-rich clusters → Al3Sc phase → layer rich in Zr → layer rich in Ti → Al3(Sc, Zr, Ti) phase. In Al–Li alloy containing Sc, Zr and Ti, some spherical particles Al3M are prone to form and those particles are enveloped by δˊ to form core–shell dispersoids [30,36]. Combined with the result of HADDF-STEM, the core–shell composite structure still exists in alloys with different quenching rates.
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