 DICTRA 
Definition:  Diffusion Controlled
Transformation;
simulation software
for diffusion and
phase
transformations 
Explanation:  Dictra is a
simulation software
for diffusion
controlled
reactions in
multicomponent
alloys. The
calculation is based
on a
thermodynamic
database and an
atomic mobility
database. Solutions
are obtained through
the application of
numerical methods in
a one dimensional
geometry.
Some applications of
Dictra include the
simulation of:
(i)
microsegregation,
during
solidification,
(ii)
homogenization,
(iii)
growth/dissolution
of
precipitates,
(iv) coarsening of
precipitates,
and
(v) diffusion
controlled phase
transformations,
e.g.
ferrite to austenite
in steels.

Picture / Figure / Diagram: 

Evolution of the aluminum concentration over time in a Fe23Mn0.3C4Al (wt%) alloy. Cooling rate 5 K s^{1}. Plateau on the left side (at 60 s) corresponds to the residual delta phase.


SFBLink:  Thermodynamic models developed in A3 (in collaboration A2, that supplies ab initio data) can be utilized for ThermoCalc calculations. These models are also used in A8 (phase field model) and to investigate experimental results obtained in the project B1. 
References:  Mats Hillert, Phase Equilibria, Phase Diagrams and Phase transformations, 2008, Cambridge University Press. http://www.thermocalc.com/productsservices/software/dictra/ 

