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Metallurgical phase transformations using the Heat Transfer Module
Posted Dec 21, 2010, 9:27 a.m. EST Heat Transfer & Phase Change Version 3.5a 1 Reply
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We are working on the modelling of the solid-state phase transformations in steels induced by laser radiation.
We would like to compare the results of different models such as Leblond, Johnson-Mehl-Avrami, etc.
To begin with, we tried to implement a model using the heat transfer module coupled with a general form PDE, but unfortunately we are getting unrealistic results, like phase fractions greater than one. Maybe you can offer some advice as to how to do this coupling with the heat transfer equation? PDE general form? PDE coefficient form? ODE? We would be really grateful!
Thanks!!
Hello Jon Lanbarri
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Have you succeeded in the implementation of your model? I'm planning to implement the Johnson-Mehl-Avrami Kolmogorov (JMAK) coupled with the chcc module. My first shoot will be a script where at each time you export the fem data, operate with the temperatures, calculate phase fractions, recalculate rho, Cp and k, and continue the time evolution (in a loop). If that doesn't work, I'll explore the option of coupling variables and time integrals.
If you have any tip to give, I'd appreciate it very much.
Best regards,