Chemistry dependence of constitutive models in crystal plasticity modeling and fast through-process modeling

Composition-dependent constitutive modeling for non-heat treatable Aluminium alloys

Aluminum alloys are key engineering materials for the entire field of lightweight engineering applications.

Besides their high relative strength, low mass density and excellent ductility, they offers further advantageous properties such as high corrosion resistance, high electrical and thermal conductivity, high reflectivity, impermeability and good recyclability.

To reach highest quality of microstructure and mechanical properties, adjustment of downstream processing parameters are often required along the process chain, dependent on exact chemcial composition of the batch and the preceding casting, deformation and annealing processing steps.
Yet, during the often fully integrated integarted processing, the material properties of aluminum semi-finished products cannot be readiuly accessed and measured.
To close this data gap, fast statistical material models can be used to compute material properties such as the microstructure and flow stress.

This is the basis for the digital twin of Aluminium industry products in complex through - process modeling chains.

Typical aluminium through-.process chain for flat sheet products. Typical aluminium through-.process chain for flat sheet products.

To predict the flow stress by means of a statistical material model, a three internal variable mean field dislocation model (3IVM) can be used and modified 

to include the contribution of solute strengthening and particle strengthening to the flow stress in order to render the model microchemistry-dependent.


Microchemistry-dependent simulation of yield stress and flow stress in non-heat treatable Al sheet alloys
Su Leen Wong et al 2020 Modelling Simul. Mater. Sci. Eng. 28 035010
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