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Dark-field hyperspectral X-ray imaging

DOI: 10.1098/rspa.2013.0629 DOI Help
PMID: 24808753 PMID Help

Authors: Christopher Egan (University of Manchester/UMIST) , Simon Jacques (University of Manchester) , Thomas Connolley (Diamond Light Source) , Matthew Wilson (Rutherford Appleton Laboratory, Science & Technology Facilities Council (STFC)) , Matt Veale (STFC) , Paul Seller (STFC) , Robert Cernik (University of Manchester/UMIST)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Proceedings Of The Royal Society A: Mathematical, Physical And Engineering Sciences , VOL 470 (2165) , PAGES 20130629 - 20130629

State: Published (Approved)
Published: February 2014
Diamond Proposal Number(s): 5897

Abstract: In recent times, there has been a drive to develop non-destructive X-ray imaging techniques that provide chemical or physical insight. To date, these methods have generally been limited; either requiring raster scanning of pencil beams, using narrow bandwidth radiation and/or limited to small samples. We have developed a novel full-field radiographic imaging technique that enables the entire physio-chemical state of an object to be imaged in a single snapshot. The method is sensitive to emitted and scattered radiation, using a spectral imaging detector and polychromatic hard X-radiation, making it particularly useful for studying large dense samples for materials science and engineering applications. The method and its extension to three-dimensional imaging is validated with a series of test objects and demonstrated to directly image the crystallographic preferred orientation and formed precipitates across an aluminium alloy friction stir weld section.

Journal Keywords: Energy-Dispersive X-Ray Diffraction; X-Ray Imaging; Computed Tomography; Materials Characterization

Subject Areas: Technique Development, Materials, Engineering

Instruments: I12-JEEP: Joint Engineering, Environmental and Processing

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