Phase-field simulations of spiral growth during directional ternary eutectic solidification
作者： Johannes Hötzer , Philipp Steinmetz , Marcus Jainta , Sebastian Schulz , Michael Kellner
DOI: 10.1016/J.ACTAMAT.2015.12.052
关键词: Chemical physics 、 Phase (matter) 、 Lamellar structure 、 Eutectic system 、 Pattern formation 、 Microstructure 、 Spiral 、 Crystallography 、 Ternary operation 、 Directional solidification 、 Materials science
摘要: A wide variety of growth patterns has been observed during the directional solidification three-phase ternary eutectics in multi-component alloys. One hypothesized pattern is spiral two rod-like phases rotating around each other, which are embedded a matrix phase. Possible evidence found experimentally longitudinal micrographs eutectic system Ag–Al–Cu. The phase-field method allows study such spatially complex microstructures order to gain deeper insights into three-dimensional formation eutectics. Based on simulation parameters, produced high tilt angle 2D lamellar growth, determined via systematic parameter studies, multiple spirals detected large-scale 3D simulations. Through presented simulations, possibility existence eutectics, reported from experiments, confirmed.
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