Abstract
The effect of constitutive parameters and microstructure on the kinematic and constitutive responses within grains in a crystal plasticity finite element (CPFE) simulation of a polycrystalline titanium alloy are compared with experimental results. The simulation of a Ti-5Al-2.5Sn sample deformed in uniaxial tension at room temperature used a phenomenological power-law based CPFE model, which includes four families of slip systems commonly observed in structural metals with a hexagonal lattice structure. The experimentally characterized microstructure patch was approximated by a quasi-3D columnar grain structure and by a more realistic 3D representation. The quasi-3D microstructure was generated by extending the EBSD characterized surface microstructure in the depth direction, while the 3D microstructure was built based on subsurface orientation information acquired using differential-aperture X-ray microscopy (DAXM). The effect of grain morphology and constitutive parameters on simulation results are compared in terms of stress-strain responses and lattice reorientation.
| Original language | English |
|---|---|
| Pages (from-to) | 21-35 |
| Number of pages | 15 |
| Journal | International Journal of Plasticity |
| Volume | 69 |
| DOIs | |
| State | Published - Jun 2015 |
| Externally published | Yes |
Keywords
- A. Grain boundaries
- B. Anisotropic material, crystal plasticity
- C. Finite elements
- Heterogeneous deformation