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 |
Funding
This research was supported by the US Department of Energy, Office of Basic Energy Science through grant No. DE-FG02-10ER46637 and in part by Michigan State University through computational resources provided by the Institute for Cyber-Enabled Research . The authors would like to thank Mr T. Van Daam of Pratt & Whitney, Rocketdyne, for providing the Ti-5Al-2.5Sn alloy used in this study. The DAXM characterization was performed at Beamline 34-ID-E of the Advanced Photon Source. Use of the Advanced Photon Source at Argonne National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences , under Contract No. DE-AC02-06CH11357 . The authors appreciate the support by D. Raabe for an extended summer stay at Max-Planck-Institut für Eisenforschung, Düsseldorf, and the many inspiring discussions with members of his department.
Keywords
- A. Grain boundaries
- B. Anisotropic material, crystal plasticity
- C. Finite elements
- Heterogeneous deformation
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