Modeling Texture, Twinning and Hardening Evolution during Deformation of Hexagonal Materials

By C. Tomé, G. Kaschner. 2005

343 citations recorded by the source corpus.

Hexagonal materials deform plastically by activating diverse slip and twinning modes. The activation of such modes depends on their relative critical stresses, function of temperature and strain rate, and the orientation of the crystals with respect to the loading direction. For a constitutive description of these materials to be reliable, it has to account for texture evolution associated with twin reorientation, and for the effect of the twin barriers on dislocation propagation and on the stress-strain response. In this work we introduce a model for twinning which accounts explicitly for the composite character of the grain, formed by a matrix with embedded twin lamellae which evolve with deformation. Texture evolution takes place through reorientation due to slip and twinning. The role of the twins as barriers to dislocations is explicitly incorporated into the hardening description via a directional Hall-Petch mechanism. We apply this model to the interpretation of compression experiments both, monotonic and changing the loading direction, done in rolled Zr at 76K.

Subfields: Biomaterials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/a1d5f7c3e8f999f0654b87e056ddf4cb4ec97af0

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Biomaterials

In Materials Chemistry

Citations in the corpus

Multiscale modeling of plasticity based on embedding the viscoplastic self-consistent formulation in implicit finite elements (2012, methodology): “These VPSC extensions include the composite-grain model (Proust et al., 2007), designed to capture the strongly anisotropic slip-twin interactions and the use of dislocation-density based hardening models (Beyerlein and Tomé, 2008), which includes grain-size and kinematic hardening effects, along…”
Modeling mechanical response and texture evolution of α-uranium as a function of strain rate and temperature using polycrystal plasticity (2013, methodology): “The twin transformation is modeled using a version of the Composite Grain (CG) model in which matrix and twin are treated as uncoupled lamellae (Proust et al., 2009) instead of enforcing continuity conditions across the twin-matrix interface (Proust et al., 2007).”