Phase Field Model

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Phase Field Model

• What is PF?
• Computational approach to modeling and
  predicting mesoscale morphological
  microstructure evolution.
• Structure is described using conserved and
  non-conserved parameters where evolution is
  governed by Cahn-Hilliard nonlinear equation and
  Alen-Cahn relaxation equation.

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In our case, the binary Nickel-Aluminum system
modeled to study the precipitation of the ordered
phased, ?, ' , from the disordered phase, ?, .
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The term "superalloy" was first used shortly
after World War II to describe a group of alloys
developed for use in turbosuperchargers and
aircraft turbine engines that required high
performance at elevated temperatures. Properties
1. High strength 2. Corrosion resistant 3. Low
temperature ductility Gamma Gamma Prime low
misfit with parent phase (0-1) coherency enables
material to retain strength up to high
strength prevents dislocation climb at high
temperature using APB
TMS
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Single DS POLY
http//www.msm.cam.ac.uk/phase-trans/2003/Superall
oys/superalloys.html
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1 3 5 7 10 reduced timesteps.
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