Dendritic segregation

Philibert J. Weinryb E. Ancey M., A quantitative study of dendritic segregation in iron-base alloys with the electronprobe microanalyzer. Metallurgie, (1965) 203-211... 

Ward R. G., Effect of annealing on the dendritic segregation of manganese in steel. JISI, 194 (1956) 930-932... 

Dendrite segregation 3. The dendrite segregation derives from the component difference of inside, the interdendrite and the dendrite bole of the usual equiaxed crystals or columnar crystals. 

Covers for the melt can be used. Prebumed charcoal has been successfully used as a cover and is appHed hot directly from the prebumer. Fluxing and deoxidation is not necessary because of the strong affinity silicon has for oxygen. Silicon-heating scrap must be kept segregated from other scrap, because silicon as an impurity ia other alloys can promote a very coarse dendritic stmcture and weak porous castings. 

Cervi L, MacDonald AS, Kane C, Dzierszinski F, Pearce EJ Dendritic cells copulsed with microbial and helminth antigens undergo modified maturation, segregate the antigens to distinct intracellular compartments, and concurrently induce microbe-specific Thl and helminth-specific Th2 responses. J Immunol 2004 172 2016-2020. 

The phase-field simulations reproduce a wide range of microstructural phenomena such as dendrite formation in supercooled fixed-stoichiometry systems [10], dendrite formation and segregation patterns in constitutionally supercooled alloy systems [11], elastic interactions between precipitates [12], and polycrystalline solidification, impingement, and grain growth [6]. 

As a reasonable approximation, the dendritic structure may be represented by the diagram in Fig. 22.4. The solidification in the interdendritic space can be described by constructing the cell (shown dashed) and assuming that solidification proceeds in a manner similar to the plane-front solidification of a bar (as discussed in Section 22.1). Under typical casting conditions, kf k. Therefore, the segregation... 

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