Authors: Gene E Ice
Publish Date: 2008/06/24
Volume: 39, Issue: 13, Pages: 3058-
Abstract
Polychromatic microdiffraction is an emerging materialscharacterization tool made practical by powerful Xray and neutron sources and by advanced optics and software With polychromatic techniques local crystalline properties including phase texture orientation elastic strain and defect density can be mapped with submicron spatial resolution in three dimensions Here we describe the evolving ability to nondestructively map local crystal structure in three dimensions and discuss how future advances will help address longstanding issues of inhomogeneous grain growth deformation fracture and elastic strain Current and future applications impact virtually all materials including electronic solar and lightemittingdiode LED materials nanomaterials structural materials and joining materials In addition the ability to focus small beams on small samples dramatically increases signaltonoise and greatly reduces the cost for extreme environmental chambers required for highpressure hightemperature highmagnetic field or corrosive environments Polychromatic techniques efficiently use source brilliance and minimize the required sample volume which is essential for hardtomake materials irreplaceable materials and for radioactive toxic or otherwise dangerous materials New polychromatic neutron capabilities will significantly extend the range of samples that can be studied with neutrons and presents important new scientific opportunities for studies of magnetic materials low Z elements fragile crystal structures and small samples in extreme environmentsThis article is based on a presentation given in the symposium entitled “Neutron and XRay Studies for Probing Materials Behavior” which occurred during the TMS Spring Meeting in New Orleans LA March 9–13 2008 under the auspices of the National Science Foundation TMS the TMS Structural Materials Division and the TMS Advanced Characterization Testing and Simulation CommitteeThis research was sponsored by the Division of Materials Sciences and Engineering United States Department of Energy under contract with UT–Battelle LLC The experimental work in part was conducted at the Advanced Photon Source which is supported by the United States Department of Energy Office of Science Office of Basic Energy Sciences under Contract No DEAC0206CH11357 This submission was sponsored by a contractor of the United States Government under Contract No DEAC0500OR22725 with the United States Department of EnergyThe United States Government retains and the publisher by accepting this submission for publication acknowledges that the United States Government retains a nonexclusive paidup irrevocable worldwide license to publish or reproduce the published form of this submission or allow others to do so for United States Government purposes
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