MOBFE8 Elements and Phases

Included Elements

There are 29 elements included in the most recent version of the database.

Al	B	C	Ca	Ce	Co	Cr	Cu	Fe	H
Mg	Mn	Mo	N	Nb	Ni	O	P	Ru	S
Si	Sn	Ta	Ti	W	V	Y	Zn	Zr

Included Phases

BCC_A2	CEMENTITE	FCC_A1	FE4N_LP1	HCP_A3	LIQUID
M5C2

The phases have diffusion data included in the database. You can include other phases in a diffusion simulation. However, these other phases are treated as so-called diffusion NONE, i.e. there is no diffusion considered in these other phases. Any phase not listed above is automatically entered as diffusion NONE (in Console Mode in the DICTRA module or in Graphical Mode with the Diffusion Module (DICTRA) and/or Precipitation Module (TC-PRISMA)), as long as a thermodynamic description for the phases is retrieved prior to reading data from the mobility database.

A model from Jönsson includes the effect on diffusion from the ferromagnetic transition in body-centred cubic Fe [B. Jönsson, On Ferromagnetic Ordering and Lattice Diffusion: A Simple Model. Zeitschrift für Met. 83, 349–355 (1992)]. Diffusion data for the LIQUID phase has been assessed for systems where experimental data is available; otherwise the modified Sutherland equation was used for estimation. For the phase HCP_A3 most data are assumed to be the same as that in FCC_A1.

Limits

As in the spirit of the CALPHAD method, predictions can be made for multicomponent systems by extrapolation into multicomponent space of data critically evaluated and assessed based on binary, ternary and in some cases higher order systems. However, critical calculations must always be verified by equilibrium experimental data; it is the user's responsibility to verify the calculations but Thermo‑Calc Software AB is interested to know about any significant deviations in order to improve any future release.