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Effect of realistic 3D microstructure in crystal plasticity finite element analysis of polycrystalline Ti-5Al-2.5Sn

  • C. Zhang
  • , H. Li
  • , P. Eisenlohr
  • , W. Liu
  • , C. J. Boehlert
  • , M. A. Crimp
  • , T. R. Bieler

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

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 languageEnglish
Pages (from-to)21-35
Number of pages15
JournalInternational Journal of Plasticity
Volume69
DOIs
StatePublished - Jun 2015
Externally publishedYes

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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