Dresden 2014 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 34: Poster Session

MM 34.11: Poster

Dienstag, 1. April 2014, 18:00–20:00, P4

The Grain Mapper at the High Energy Beamline HEMS — •Torben Fischer, Lars Lottermoser, Sven Kleeband, Norbert Schell, Martin Müller, and Andreas Schreyer — Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany

The 3D investigation of polycrystalline materials allows the study of the relationship between macroscopic and micro structural properties at the level of single grains. A main objective is the measurement of the 3D strain state between single grains. The High Energy Materials Science Beamline (HEMS), operated by the Helmholtz-Zentrum Geesthacht (HZG), has a dedicated hutch for such 3D techniques. HEMS is situated at the high brilliance synchrotron storage ring PETRA III at DESY in Hamburg and has a tuneable energy range between 30 and 200 keV. Fast detector systems and high photon flux allow for highly dynamic investigations, e.g. of phase transformation or catalysis. The X-ray beam can be focused down to micrometre size with compound refractive lenses (CRLs). The grain mapper is an optimized endstation for the 3D-XRD technique. The grain mapper consists of a solid granite substructure, a high precision rotation stage and portals for far- and near-field detectors. The instrument has finished commissioning phase and first results will be presented. The main scientific topics addressed are the investigation of new joining and machining processes, metallurgy, chemistry and material physics.