Fig. 1: Dendrite orientation transition in Al–Sm alloys.
From: Controlling solid-liquid interfacial energy anisotropy through the isotropic liquid
a A columnar dendritic microstructure obtained in a laser remelted Al–2.2 at.% Sm alloy. The microstructure shown here is consistent with a seaweed structure, closely related to a hyper-branched dendritic structure described by Haxihimali et al.12. The scale bar indicates 10 \(\upmu {\rm{m}}\). b Equiaxed \(\langle 110\rangle\) dendrites observed in a laser remelted Al–5.6 at.% Sm alloy (scale bar 2 \(\upmu {\rm{m}}\)). c A three-dimensional dendrite from a phase-field simulation, with a section showing the highlighted six \(\langle 110\rangle\) branches. The microstructure in (b) is composed of \(\langle 110\rangle\) dendrites is verified by the observed sixfold symmetry.
