The Solidification Kinetic Database Syntax and Examples
The Solidification kinetic database (.SDB) uses the XML format, which defines the back diffusion model for the morphology of primary phase and its corresponding model parameters such as interfacial energy, latent heat, coarsening geometric factor, dendrite tip factor, solute trapping parameter, solid diffusivity factor, boundary layer factor, and so on.
In the SDB, a series of alloys can be defined. A sample SDB file is given below,
<Alloy name="Mg alloys">
<solvent name="Mg"/>
<primary_phase name="Hcp"/>
<ParameterTable name="">
<Parameter name="coordinate" value="0" description = "geometry of dendrite. 0 for plate; 1 for cylinder; 2 for sphere" />
<Parameter name="interfacial_energy" value="0.065" description = "interfacial energy, unit = J/m^2"/>
<Parameter name="latent_heat" value="5.5e8" description = "latent heat, unit=J/m^3"/>
<Parameter name="solute_trapping_parameter" value="1e-9" description = "solute trapping parameter, unit=m"/>
<Parameter name="sound_velocity" value="1000" description = "sound velocity, unit=m/s"/>
<Parameter name="coarsening_geometric_factor" value="40" description = "No unit"/>
<Parameter name="dendrite_tip_factor" value="1" description = "No unit"/>
<Parameter name="solid_diffusivity_factor" value="0.2" description = "No unit"/>
<Parameter name="boundary_layer_factor" value="1" description = "No unit"/>
</ParameterTable>
</Alloy>
</sdb>
In this sample SDB, “Mg alloys” is defined as the name of the alloy, the primary phase is thus set as “Hcp” phase. A set of parameters for each phase, such as interfacial energy, latent heat and so on, can be defined in “ParameterTable”. The kinetic model parameters that can be defined under “ParameterTable” are listed in Table 1.