scholarly journals Geometrical effect on macrosegregation formation during unidirectional solidification of Al–Si alloy

2021 ◽  
Vol 288 ◽  
pp. 116913
Author(s):  
Haijie Zhang ◽  
Menghuai Wu ◽  
Surendra N. Tewari ◽  
Andreas Ludwig ◽  
Abdellah Kharicha
Keyword(s):  
Unidirectional Solidification ◽  
Geometrical Effect

scholarly journals Pore structure of porous Mg-1Mn-xZn alloy fabricated by metal–gas eutectic unidirectional solidification

2021 ◽  
Author(s):  
Canxu Zhou ◽  
Gangqiang Liang ◽  
Yuan Liu ◽  
Huawei Zhang ◽  
Xiang Chen ◽  
...  
Keyword(s):  
Pore Structure ◽  
Unidirectional Solidification

Modelling of Dendritic Growth during Unidirectional Solidification by the Method of Cellular Automata

2010 ◽  
Vol 649 ◽  
pp. 217-222 ◽  
Author(s):  
Andriy A. Burbelko ◽  
Edward Fraś ◽  
Wojciech Kapturkiewicz ◽  
Daniel Gurgul
Keyword(s):  
Cellular Automata ◽  
Dendritic Growth ◽  
Solid Phase ◽  
Concentration Field ◽  
Unidirectional Solidification ◽  
Process Conditions ◽  
Component Solution ◽  
Mould Wall ◽  
Temperature Heat ◽  
Wall Zone

Modelling was carried out to investigate the internal dendrite grains structure formation from a liquid two-component solution in the area adjacent to a mould wall. For the simulation, our own model and computer program based on CAFD (Cellular Automata Finite Differences) were used. In modelling, the effect of process conditions and material-related parameters, e.g. nucleation temperature, heat exchange rate, interfacial energy, crystal orientation with respect to the casting wall, etc. on the nature of the dendritic grain growth was examined. It was demonstrated that the profile of concentration field in a near-mould-wall zone impedes the growth of the solid phase in the direct vicinity of the wall. A local melting down of the grains of a solid phase due to the segregation of admixtures reducing the alloy point of liquidus is also possible.

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