A method for measuring single-crystal elastic moduli using high-energy X-ray diffraction and a crystal-based finite element model
- Cornell
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 {beta}21s, 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 {beta}21s are C{sub 11} = 110 GPa, C{sub 12} = 74 GPa and C{sub 44} = 89 GPa. The resulting Zener anisotropic ratio is A = 5.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1002684
- Journal Information:
- Acta Mater., Vol. 58, Issue (17) ; 10, 2010; ISSN 1359-6454
- Country of Publication:
- United States
- Language:
- ENGLISH
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