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Thermodynamic Simulation of Phases
In foundry technology research, Thermo-Calc and DICTRA simulation software
are of great benefit as they can be used to perform thermodynamic and phase
diagram calculations in different multicomponent systems.
The mass fraction solid/liquid during solidification,
under equilibrium or non equilibrium cooling conditions,
can also be determined and therefore the temperature
interval assessed to evaluate the semi-solid casting
capabilities of an alloy.
In addition DICTRA can be used to envisage diffusion
controlled phase transformations. It can therefore be
employed to investigate microsegregation and hot tearing
during solidification and examine the growth and
dissolution of precipitates.
Experimental results from casting practice have shown
good agreement with the simulations (see Fig. 2).
Brian McKay
Lehrstuhl für Gießereikunde - LfGK
an der MUL seit: 2003
Email: brian.mckay@unileoben.ac.at
institute.unileoben.ac.at/giessereikunde
Zur Person:
1997-2001: PhD, University of Oxford
2001-2002: Post-doc, UMIST
2003-2009: University Assistant, LfGK, MUL
Thermo-Calc calculations are based on a range of databases
compiled using experimental data. The databases
include those necessary to investigate Steel, Al, Mg, and
Ti alloys. In recent studies the LfGK has used a TTAL5
(Al) database which enabled complex Al multi-component
diagrams to be constructed and analysed (see Fig. 1).
From this data, heat treatments were devised to aid phase
selection thereby improving the castability, corrosion resistance
and mechanical properties of as-cast parts.
Salar Bozorgi
Lehrstuhl für Gießereikunde - LfGK
an der MUL seit: 2006
Email: salar.bozorgi@unileoben.ac.at
institute.unileoben.ac.at/giessereikunde
Zur Person:
2005-2008: MSc, MUL
2008-Present: Research Assistant, LfGK, MUL