CALCULATE

EASY TO USE

PLATFORM

LICENSES

Windows, Linux, and Mac OSRefer to our website for complete system requirements

Single machine or network installAnnual or perpetual op�onsLicense fees depend on several factors, i.e., database selec�on

The Diffusion Module makes modeling mul�component diffusion controlled transforma�ons simple and accessible, so you don’t need to be an expert in computa�onal thermodynamics and kine�cs to use it. A Ge�ng Started guide and examples of the most common kinds of problems are provided with the so�ware. Companion videos are available for some of the examples.

Homogeniza�on of alloysGrowth/dissolu�on of precipitate phases Coarsening, or Ostwald ripening, of precipitate phasesMicrosegrega�on during solidifica�onInterdiffusion in compounds, e.g. coa�ng systemsCarburiza�on, nitriding and carbonitriding of high-temperature alloys and steelsInfluence of chemistry on diffusion coefficients in an alloyDiffusion in a temperature gradientDiffusion in ordered and ionic/oxide phases

Diffusion Module (DICTRA)

The Diffusion Module (DICTRA) is a unique add-on module within Thermo-Calc for the accurate simulation of diffusion controlled reactions in multicomponent alloy systems. The Diffusion Module (DICTRA) is based on the numerical solution of the multicomponent diffusion equations and the CALPHAD approach.

EvolutionThe Diffusion Module (DICTRA) was originally developed through a collaboration of the Royal Institute of Technology in Stockholm, Sweden, and the Max Plank Institute, Germany, and was first licensed commercially in 1992. Today, nearly 30% of Thermo-Calc Software customers add this module to their license in order to consider the influence of kinetics in their research.

Consistently Maintained and UpdatedThe Diffusion Module (DICTRA) has been consistently updated and improved since its release to satisfy the evolving needs of our user-base. It has now been integrated as a module within Thermo-Calc and, as such, is now on a two-times-per-year release cycle. Customers with a maintenance and support subscription for the Diffusion Module (DICTRA) receive these updates for free.

Technical Support and Training The Diffusion Module (DICTRA) is backed by a dedicated customer technical support team. We also have agents around the world, as well as a subsidiary in the USA, who provide local customer support. Online training courses are offered several times throughout the year, and in-person courses are offered by some agents. We also provide training videos, available on our website.

High Quality Mobility DatabasesIn order to perform a diffusion simulation, both a thermodynamic and a kinetic database are needed. The thermodynamic database is the same as used by Thermo-Calc, whereas the kinetic database is an additional database that contains information about the atomic mobility of individual components in relevant phases. The kinetic databases are created through an assessment procedure similar to the one that is used for thermodynamic databases. Mobility databases are currently available for:

0 0.05 0.10 0.15 0.20

Mole-Fraction of AL

-11.5

-12.0

-12.5

-13.0

-13.5

-14.0

-14.5

-15.0

Loga

rithm

of I

nter

di�u

sion

Coe

f.

Activity-flux function

Carbon content as a function of depth and time during carburization in multicomponent alloys

Si- alloysTi- alloysHEAs

Steel and Fe-based alloys Ni-based alloys Al- alloysCu- alloysMg- alloys Solder alloys

Thermo-Calc So�ware ABEmail: info@thermocalc.comPhone: +46-8-545 959 30

USA, Canada and MexicoEmail: info@thermocalc.com

Phone: (724) 731 0074www.thermocalc.com

APPLICATIONS

BENEFITSReduce costly, �me-consuming experiments and tes�ng

Increase the value of experiments through be�er pre-screening and interpreta�on of the results

Op�mise and define safe processing windows

Base decisions on scien�fically supported data and models

Shorten development �me and bring products to market faster

Build and safeguard intellectual knowledge

Improve the quality and consistency of products through deeper understanding

Make predic�ons which are difficult or even impossible with an experimental approach

The Diffusion Module can be used to understand many different phases in the life-cycle of a material, such as:

Alloy and materials development

Cas�ng

Forging/Hot rolling

Heat treatment

Joining/Welding/Soldering

Quality control

Materials selec�on

Corrosion

Underlying causes of failure

Waste and recycling

•

•

•

•

•

•

•

•

•

•

Influence of alloy composi�on on diffusion coefficients

Symbols are experimental data taken from Yamamoto et al, Trans. Jpn. Inst. Met.

21(1980), p. 601.

Homogeniza�on of alloys

Dissolu�on of Mg2Si precipitate in Alloy A6401

Micro-segrega�on during solidifica�on in Alloy AA5182

Mul�component diffusion couple

Symbols are experimental data taken from Campbell et al, Materials Sci & Eng A

407(2005), pp. 135-146.

Diffusion in ordered phasesSymbols are experimental data from E. Perez, T. Patterson and Y. Sohn, J. Phase Equilibria

and Diffusion 27(2006), pp. 659-64.

Mole-Frac�on

NiAl coating IN939 alloy

LOG

DC(F

CC,A

L,AL

,NI)

Diffusion Module (DICTRA)