1. Quantification of local dislocation density using 3D synchrotron monochromatic X-ray microdiffraction.
- Author
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Zhou, Guangni, Pantleon, Wolfgang, Xu, Ruqing, Liu, Wenjun, Chen, Kai, and Zhang, Yubin
- Subjects
DISLOCATION density ,SYNCHROTRONS ,X-rays ,INHOMOGENEOUS materials ,X-ray powder diffraction - Abstract
A novel approach evolved from the classical Wilkens' method has been developed to quantify the local dislocation density based on X-ray radial profiles obtained by 3D synchrotron monochromatic X-ray microdiffraction. A deformed Ni-based superalloy consisting of γ matrix and γ′ precipitates has been employed as model material. The quantitative results show that the local dislocation densities vary with the depths along the incident X-ray beam in both phases and are consistently higher in the γ matrix than in the γ′ precipitates. The results from X-ray microdiffraction are in general agreement with the transmission electron microscopic observations. A new approach based on 3D synchrotron microdiffraction showing broad application potential in heterogeneous materials was developed and applied to quantify local dislocation densities in a fatigued two-phase Ni-based superalloy. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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