Mobility Databases

From these databases and use of 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. A mobility database is needed for performing simulations using either the Diffusion module (DICTRA) or the Precipitation module (TC-PRISMA), but can also be used with any of the Software Development Kits (SDKs).

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 optimised 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 optimised by experts after assessing available experimental information and using an optimisation 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 optimisation 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. We will be happy to assist you.

All mobility databases.

MOBFE4 is the specialised steel database. MOBFE4 is intended for use with the TCFE9 database.
MOB2 database is intended for use with TCFE5 and older versions as well as SSOL6 databases and can, to some extent, be used for other alloys as well. 

MOBNI4 is the specialised nickel-based superalloys database and is intended for use with the TCNI8 database, whereas its previous version, MOBNI1, is compatible with the TTNI8 database.

MOBAL3 is the specialised aluminium-based database and is intended for use with the TCAL4 database, whereas its previous version, MOBAl1, is compatible with the TTAL8 database.

Magnesium Alloys

MOBMG1 is the specialised magnesium-based database and is intended for use with the TCMG4 database.

MOBCU2 is the specialised copper-based database and is intended for use with the TCCU2 database.

MOBTI2 is the specialised Ti-alloys database and is intended for use with the TCTI1 database, whereas the previous version, MOBTI1, is compatible with the TTTI3 database.

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

Silicon-based Alloys

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