Tracking Polycrystalline Responses with High Energy Diffraction
by
Prof.Robert Suter(Carnegie Mellon University)
→
Europe/Berlin
Building 1b | SR3 (DESY Hamburg)
Building 1b | SR3
DESY Hamburg
Notkestr. 85
22607 Hamburg
Description
High Energy Diffraction Microscopy is a version of Three Dimensional
X-ray Diffraction Microscopy (3DXRD) implemented at the Advanced Photon
Source. Near-field measurements map grain locations, shapes,
orientations and orientation variations over volumes of the order of a
cubic millimeter. Far-field measurements add elastic strain state
sensitivity. These measurements, combined with tomographic imaging of
sample shape and interior density variations, are being used to track
responses to thermal, mechanical, and other externally applied loads.
This talk will give an overview of facilities, data structure, and
analysis tools ranging from near-field reconstructions to computational
tools required to make optimal use of the data sets. Examples will
include thermal responses in an aluminum sample, complex topologies in a
titanium alloy, and combined near- and far-field measurements in
mechanically loaded titanium. The possibility of combining these
measurements with coherent diffractive imaging of individual grains
using upgraded MBA-based synchrotrons will be discussed at the end.
