What is it about?

Here, a model is presented that allows to describe the main deformation modes of hexagonal metals, dislocation glide and twinning, in a unfified fashion. To this end, we combine a dislocation density based crystal plasticity formulation to model the dislocation glide and a phase field model to describe the twinning in a spatially-resolved way.

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Why is it important?

Modelling twinning AND dislocation glide is important to understand the deformation behavior of hexagonal materials such as magnesium. While traditionally, twinning was incorporated into crystal plasticity models only in a mean field approximation and was modelled with phase field models only without crystal plasticity, this model combines both aspects.

Perspectives

The current model is only capable to handle one twin variant. Extension to all 6 variants is focus of our current research.

Martin Diehl
Associatie KU Leuven

Read the Original

This page is a summary of: An integrated crystal plasticity–phase field model for spatially resolved twin nucleation, propagation, and growth in hexagonal materials, International Journal of Plasticity, March 2018, Elsevier, DOI: 10.1016/j.ijplas.2018.03.009.
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