In situ observation of the specific nucleation behavior of grains during the solidification of Al alloy inoculated by Sc

Article Materials Science, Multidisciplinary

In situ radiographic study of the grain refining behavior of Al3Sc during the solidification of Al-10Cu alloy

Yue Wu et al.

Summary: This study investigates the microstructural evolution of Al3Sc particles and alpha-Al grains during solidification using in situ synchrotron X-ray radiography. The best refinement is achieved in the sample with 0.6 wt.% Sc addition, attributed to efficient grain nucleation, uniform distribution of small initial grains, and prolonged melt convection. This research provides valuable insights for the composition design and casting process of Al alloys inoculated with rare earth elements.

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY (2022)

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Article Chemistry, Physical

Morphological characteristics of Al3Sc particles and crystallographic orientation relationships of Al3Sc/Al interface in cast Al-Sc alloy

K. Yan et al.

Summary: Rare earth element Sc has a strong grain refining effect on cast aluminum alloys by forming Al3Sc particles as heterogeneous nucleation cores, which can be observed via microscopy. The internal structure of Al3Sc particles shows coarse dendritic and fine cell structures, with white oxide residues in some particles. At the interface between Al3Sc and Al matrix, two parallel crystallographic ORs were observed along with a special pseudomorphic solid layer.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

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Article Materials Science, Multidisciplinary

Interaction between nucleant particles and a solid-liquid interface in Al-4.5Cu alloy

Y. Liu et al.

Summary: In-situ Al3Ti and TiB2 particles were synthesized by adding halide salts and excess titanium into molten aluminum alloys to reduce grain sizes significantly. Experimental results showed that the traditional particle pushing mechanisms based on interfacial energy interactions may not be applicable in this case, as particles were pushed into the interdendritic regions by growing dendrites regardless of growth rates.

ACTA MATERIALIA (2021)

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Article Nanoscience & Nanotechnology