Metal Processing Module
New Functionality in Version 6.4
MultiPhysics Interface for Induction Hardening
A new Induction Hardening multiphysics interface has been introduced for modeling of induction hardening processes for steel parts. This multiphysics interface combines the functionality of the Heat Transfer in Solids, Austenite Decomposition, Solid Mechanics, and Magnetic Fields interfaces. It requires both the AC/DC Module and the Metal Processing Module
Phase Transformation Models for Austenitization
Two new phase transformation models have been introduced to model the transformation of ferritic phases of steel into austenite during heating.
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Using the Linear phase transformation model is a simple way to model austenitization. In this model, the rate of austenite formation is taken to be active between lower and upper temperature limits and proportional to the rate of temperature.
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The Oddy–McDill–Karlsson phase transformation model can be used to simulate heating of hypoeutectoid steels. Its mathematical form is based on the Johnson–Mehl–Avrami–Kolmogorov (JMAK) model, but it has a specific form for the time constant in the expression, and the equilibrium phase fraction is replaced by the eutectoid fraction of austenite.
Stress-Dependent Martensitic Transformation
You can now let stresses affect the onset of the phase transformation through a shift of the martensite start temperature, Ms. The start temperature is shifted depending on the pressure and the effective (von Mises) stress.
Improved Phase Transformation Computations
The performance of phase transformation computations has been improved by forcing the fraction of one phase to be algebraically prescribed by the remaining phase fractions and the requirement that they add to unity.
Improved Results Processing of Phase Fractions
The visualization of computed phase fractions has been improved though the introduction of new Gauss-point-based phase fraction variables. For example: The variable corresponding to audc.phase1.xi is called audc.phase1.xiGp. Using these variables generally produces smoother plots.
Transformation Conditions FOR Austenite Decomposition Interfaces
When one of the Austenite Decomposition interfaces is added, Transformation Condition subnodes requiring isothermal or cooling conditions are now added to the ferritic, pearlitic, and bainitic phase transformations. This is also done for the corresponding phase transformations during import of phase transformation data from JMatPro®.