Effect of Dislocation Density and Incompatibility Tensor Fields on Misorientation Developments in Lath Block Structure based on FTMP

Abstract

FTMP concept is applied to computationally fabricate complex microstructured samples to be further utilized in various deformation analyses based on, e.g., FEM. Here, we focus on the process of modeling single lath-block structures provided the corresponding eigenstrain distributions based on the Bain lattice correspondence is initially introduced. One of the keys for the lath-block modeling is the development of misorientation across the lath boundaries, together with the attendant internal stress fields. FTMP-based approach exhibits spontaneous evolution of such misorientation when substantial contribution of the incompatibility tensor is introduced in the hardening law. And it was found that the dislocation density term has a function of suppressing misorientation in the hardening law.