Journal
INTERNATIONAL JOURNAL OF PLASTICITY
Volume 69, Issue -, Pages 21-35Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijplas.2015.01.003
Keywords
Grain boundaries; Anisotropic material crystal plasticity; Finite elements; Heterogeneous deformation
Funding
- US Department of Energy, Office of Basic Energy Science [DE-FG02-10ER46637]
- Michigan State University
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1108211] Funding Source: National Science Foundation
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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 Ti5Al-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. (C) 2015 Elsevier Ltd. All rights reserved.
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