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The 3-D morphology of α-Mg dendrites for Mg−30wt.% Sn and Mg−30wt.% Gd alloys was investigated and characterised using the synchrotron X-ray tomography technique. Results show that the α-Mg dendrites had eighteen primary branches with six growing along 〈112¯0〉 directions in the {0001} basal plane and twelve along 〈112¯3〉 directions in the non-basal plane. The 〈112¯0〉-oriented branches had secondary...
Alloy dendrite growth during solidification with coupled thermal-solute-convection fields has been studied by phase field modeling and simulation. The coupled transport equations were solved using a novel parallel-multigrid numerical approach with high computational efficiency that has enabled the investigation of dendrite growth with realistic alloy values of Lewis number ∼104 and Prandtl number...
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