Mobility Databases

Mobility databases are used to make simulations in our add on kinetic modules: the Diffusion Module (DICTRA) and the Precipitation Module (TC-PRISMA), and can also be used with any of the Software Development Kits (SDKs).

With these databases, combined with the appropriate software, the mobility of an element in a specific phase can be calculated as a function of temperature and composition. If combined with a compatible thermodynamic database, the various diffusion coefficients can readily be calculated.

How We Develop Mobility Databases

Mobility databases are developed in a similar fashion as thermodynamic databases, i.e. following the CALPHAD method. The difference being that a mobility database contains optimized parameters that enter a model that describes the logarithm of the atomic mobility, rather than the Gibb's free energy, which is the case for a thermodynamic database. The parameters in a mobility database have been optimized by experts after assessing available experimental information and using an optimization tool specifically designed for this purpose and which is provided within the Add-on Diffusion Module (DICTRA) and Precipitation Module (TC-PRISMA).

The so-called thermodynamic factors, which are required during the optimization of mobility parameters from experimental inter- or intrinsic-diffusion data, depend on the selected thermodynamic description. For this reason a mobility database is only fully compatible to a specific thermodynamic description.

At Thermo-Calc Software, we have extensive experience in this field, including employees who pioneered this work more than 20 years ago.

If you need assistance in selecting the optimum set of databases, please do not hesitate to contacts us. 

MOBFE5 is the specialised steel database compatiable with the TCFE10 database.

MOBNI5 is the specialised nickel-based superalloys database and is intended for use with the TCNI10 database. MOBNI1 is compatible with the TTNI8 database.

MOBAL5 is the specialised aluminium-based database and is intended for use with the TCAL7 database. MOBAl1 is compatible with the TTAL8 database.

Magnesium Alloys

MOBMG1 is the specialised magnesium-based database and is intended for use with the TCMG5 database.

MOBCU3 is the specialised copper-based database and is intended for use with the TCCU3 database.

MOBTI3 is the specialised Ti-alloys database and is intended for use with the TCTI2 database. MOBTI1 is compatible with the TTTI3 database.

MOBSLD1 is the specialised solder alloys database and is intended for use with TCSLD3

MOBHEA2 is the specialised high entropy alloys database and is intended for use with TCHEA4

Silicon-based Alloys

MOBSI1 is the specialised silicon-based database and is intended for use with the TCSI1 database.

General Alloys and Substances

MOB2 database is intended for use with TCFE5 and older versions as well as SSOL7 databases and can, to some extent, be used for other alloys as well.