Elastic-viscoplastic self-consistent modeling for finite deformation of polycrystalline materials

Anisotropic 1-site and 2-site self-consistent models are developed to describe the elastic-viscoplastic behavior of polycrystalline materials deformed finite strains on basis rate-dependent crystallographic slip a generalized Hill-Hutchinson approach. The choice constitutive law at single crystal level implemented in is discussed through fitting experimental data calibrating viscous parameters. It found that drag-stress type Norton works well for (EVPSC) model while threshold stress suitable EVPSC assure viscoplastic inter-granular interaction realistic. Both have been verified by thoroughly literatures. For model, selected covers both macroscopic microscopic mechanical responses steels during deformation with large range strain rate from quasi-static (10−4s−1) dynamic (~104s−1). situ neutron diffraction nickel-based superalloys various microstructures was fitted. generally fit well. A comparison between elastic-plastic (EPSC) prediction lattice has also made cases, which verifies predictability newly models. validation homogenization approach modeling performed, confirms proposed applicable cubic structure deformations. Our formulation this work shines spotlight way developing multi-functional predict behaviors under different loading rates 10−4s−1~104s−1.