|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Coupling Experiments and Modeling to Understand Plasticity and Failure
||Characterizing the Effects a Smooth Crystal Lattice Orientation Field Formulation Has on the Evolution of Intragrain Deformation
||Robert Carson, Paul Dawson
|On-Site Speaker (Planned)
The deformation field of individual crystals within a polycrystalline material is rarely uniform, but rather exhibits heterogeneity to varying degrees depending on the material, loading conditions, and crystal geometry. Accompanying this heterogeneous deformation field are gradients of the crystallographic orientation within a crystal. The extent to which these gradients influence the continued evolution of the deformation and the material’s mechanical state is not well understood. We explore this issue by examining the impact of imposing a continuous lattice orientation field across each crystal. First, we present a new formulation for solving the lattice orientations in which continuity is explicitly imposed over each crystal volume. Next, we quantify the impact of imposing continuity on the spatial distribution of lattice orientation by comparing simulation results with and without continuity constraints imposed. Finally, we will discuss how these results can be used in the interpretation of far-field high energy x-ray diffraction data.
||Planned: Supplemental Proceedings volume