Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10620731 | Acta Materialia | 2010 | 14 Pages |
Abstract
This paper presents a method - based on high-energy synchrotron X-ray diffraction data and a crystal-based finite element simulation formulation - for understanding grain scale deformation behavior within a polycrystalline aggregate. We illustrate this method by using it to determine the single-crystal elastic moduli of β21s, a body-centered cubic titanium alloy. We employed a polycrystalline sample. Using in situ loading and high-energy X-rays at the Advanced Photon Source beamline 1-ID-C, we measured components of the lattice strain tensor from four individual grains embedded within a polycrystalline specimen. We implemented an optimization routine that minimized the difference between the experiment and simulation lattice strains. Sensitivity coefficients needed in the optimization routine are generated numerically using the finite element model. The elastic moduli that we computed for the β21s are C11 = 110 GPa, C12 = 74 GPa and C44 = 89 GPa. The resulting Zener anisotropic ratio is A = 5.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
C. Efstathiou, D.E. Boyce, J.-S. Park, U. Lienert, P.R. Dawson, M.P. Miller,