title: Dark-field hyperspectral X-ray imaging.
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.
authors.affiliation: School of Materials , University of Manchester , Manchester M13 9PL, UK.
authors.forename: Christopher K
authors.initials: CK
authors.lastname: Egan
authors.affiliation: School of Materials , University of Manchester , Manchester M13 9PL, UK.
authors.forename: Simon D M
authors.initials: SD
authors.lastname: Jacques
authors.affiliation: Diamond Light Source , Harwell Science and Innovation Campus , Didcot, Oxfordshire OX11 0DE, UK.
authors.forename: Thomas
authors.initials: T
authors.lastname: Connolley
authors.affiliation: Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0QX, UK.
authors.forename: Matthew D
authors.initials: MD
authors.lastname: Wilson
authors.affiliation: Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0QX, UK.
authors.forename: Matthew C
authors.initials: MC
authors.lastname: Veale
authors.affiliation: Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0QX, UK.
authors.forename: Paul
authors.initials: P
authors.lastname: Seller
authors.affiliation: School of Materials , University of Manchester , Manchester M13 9PL, UK.
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Cernik
keywords: X-ray imaging; computed tomography; energy-dispersive X-ray diffraction; materials characterization