Mushy Zone Morphology Calculation with Application of CALPHAD Technique

Importance of Melt Flow in Solidifying Mushy Zone

A mixture solidification model is employed to study the interaction between the melt flow and the growing mushy zone. The goal is to address the importance of considering the melt flow and flow pattern (laminar or turbulent) in the growing mushy zone. A simple 2D benchmark with parallel flow passing by/through a vertically growing mushy zone is considered. Parameter studies with different veloc...

The rapid advance and slow retreat of a mushy zone

We discuss a model for the evolution of a mushy zone which forms during the solidification of a binary alloy cooled from below in a tank with finite height. Our focus is on behaviours of the system that do not appear when either a semi-infinite domain or negligible solute diffusion is assumed. The problem is simplified through an assumption of negligible latent heat, and we develop a numerical ...

Study of Mushy-Zone Development in Dendritic Microstructures with Glass-Forming Eutectic Matrices Using Electrostatic Levitation

Determination of Two Unknown Thermal Coefficients Through a Mushy Zone with a Convective Overspecified Boundary Condition

We consider a semi-infinite material that is initially assumed to be liquid at its melting temperature which, without loss of generality, we assume at 0 C. At time t 0  , a heat flux (characterized by the constant 0 q 0  ) is imposed at x 0  and then solidification ensues, where three distinct regions can be distinguished (for a complete description of this mushy model see [1]): H1) Liquid, ...

The Mechanical Strength of Si Foams in the Mushy Zone during Solidification of Al–Si Alloys

The mechanical strength of an Al-30% Si alloy in the mushy zone was estimated by using a novel centrifugation apparatus. In the apparatus, the alloy melt was partially solidified, forming a porous structure made of primary Si platelets (Si foam) while cooling. Subsequently, pressure generated by centrifugal force pushed the liquid phase out of the foam. The estimated mechanical strength of the ...