Functions Describing Orientation Correlations in Polycrystalline Materials

Orientation-distribution mapping of polycrystalline materials by Raman microspectroscopy.

Raman microspectroscopy provides the means to obtain local orientations on polycrystalline materials at the submicrometer level. The present work demonstrates how orientation-distribution maps composed of Raman intensity distributions can be acquired on large areas of several hundreds of square micrometers. A polycrystalline CuInSe2 thin film was used as a model system. The orientation distribu...

Studying grain boundary regions in polycrystalline materials using spherical nano-indentation and orientation imaging microscopy

In this article, we report on the application of our spherical nanoindentation data analysis protocols to study the mechanical response of grain boundary regions in as-cast and 30% deformed polycrystalline Fe–3%Si steel. In particular, we demonstrate that it is possible to investigate the role of grain boundaries in the mechanical deformation of polycrystalline samples by systematically studyin...

Describing Functions

Reconstruction of Single-Grain Orientation Distribution Functions for Crystalline Materials

A fundamental imaging problem in microstructural analysis of metals is the reconstruction of local crystallographic orientations from X-ray diffraction measurements. This work deals with the computation of the 3D orientation distribution function for individual grains of the material in consideration. We present an iterative large-scale algorithm that uses preconditioned regularizing CGLS itera...

The Vertex Effect in Polycrystalline Materials

Acknowledgements Soli Deo Gloria. The work presented in this thesis has been done during my time as a research staff member at the Otto-von-Guericke-Universität Magdeburg. I am indebted to Prof. Albrecht Bertram, who was the advisor and the first referee of this thesis. He was a guide in finding the topic of the work and finally finishing it. His mentorship by teaching the theoretical foundatio...