A generalized solidification model and microstructural verification for the Nd–Fe–B–Ti–C system processed by rapid solidification

A generalized solidification model and microstructural verification for the Ndâ•fiFeâ•fiBâ•fiTiâ•fiC system processed by rapid solidification

A microscopic model for solidification

– We present a novel picture of a non isothermal solidification process starting from a molecular level, where the microscopic origin of the basic mechanisms and of the instabilities characterizing the approach to equilibrium is rendered more apparent than in existing approaches based on coarse grained free energy functionalsà la Landau. The system is composed by a lattice of Potts spins, which...

Rapid Solidification of Polymeric Fibers

A thorough understanding of crystallization kinetics for rapid polymer solidification during the fiber spinning process is a route to maximizing fiber properties while increasing production speeds. We are using theoretical, computational, and experimental models to characterize the crystallization process at the molecular, microscopic, and macroscopic levels. Polymer dependent molecular descrip...

A simple Analytical model for solidification cooling rate based on the local heat flux density

A new simple analytical model for prediction of cooling rate in the solidification process based on the local heat flux density extracted during solidification is introduced. In the modeling procedure, a solidifying control volume is considered in the mushy zone in which a heat balance equation is used to derive the present model. As the local heat flux density is a measurable parameter, the pr...

Model Based Control of Solidification

In this paper, model based control of solidification is studied. A one-dimensional model that describes the dynamic response of the solidification rate for a pure substance is developed. The solidification of a metal column is controlled in order to solidify at a desired rate. The manipulated variable is the power to the heater at the top of the casting. A linear PI-controller is implemented an...