Axel Henningsson, Ph.D. at Lund University
Axel Henningsson is working on methods for reconstructing the strain field
in polycrystalline materials using data from 3DXRD measurements performed
at ID11 at ESRF. Instead of using the traditional two rotation axis for
reconstruction the full strain tensor he uses a constraint of static equilibrium
to balance linear and angular momentum. The method calculates the probability
distribution of strain in a gaussian process framework.
TITLE: Intragranular strain estimation and sampling in scanning X-ray diffraction experiments.ABSTRACT: Three-dimensional X-ray diffraction (3DXRD) enables the study of the micro-structure in dense polycrystalline materials through the use of synchrotron light sources. We present recent advances in scanning-3DXRD reconstruction methods, enabling the estimation of intragranular strain tensor fields from tomographic diffraction data. Additionally, we discuss the impact of diffraction geometry for strain sampling, and touch briefly on an emerging diffraction simulation software tool, developed to answer questions about 3DXRD acquisition schemes.