| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced High Strength Steels IV
|
| Presentation Title |
High-performance Full-field Crystal Plasticity with Dislocation-based Hardening and Slip System Backstress Laws: Application to Modeling Deformation of Dual-phase Steels |
| Author(s) |
Adnan Eghtesad, Marko Knezevic |
| On-Site Speaker (Planned) |
Adnan Eghtesad |
| Abstract Scope |
This research presents a high-performance elasto-viscoplastic fast Fourier transform (EVPFFT) crystal plasticity to predict elasto-plastic, anisotropic, rate-and temperature-sensitive deformation of polycrystalline aggregates of Ferritic-Martensitic dual-phase (DP) steels subjected to large plastic strains. The solver embeds strain-path aware dislocation-based hardening and slip-system-
level kinematic backstress. The model is applied to simulate the elasto-plastic deformation of several steel variants: DP 590, DP 980, DP 1180, and martensitic, MS 1700. Crystallographic textures and phase fractions of these steels are characterized using electron
microscopy along with electron-backscattered diffraction. The model captures the monotonic behavior and particularities pertaining to cyclic deformation characteristics such as non-linear unloading upon the load reversal, the Bauschinger effect, and changes in hardening rate during strain reversals based on the evolution of dislocation density and crystallographic grain reorientation. In addition, it offers insights into the role of backstress and dislocation annihilation on the cyclic deformation of DP steels. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |