Non-Destructive Identification of Micrometer-Scale Minerals and Their Position Within a Bulk Sample

Grain interaction mechanisms leading to intragranular orientation spread in tensile deformed bulk grains of interstitial-free steel

“…Particular emphasis has been on understanding the deformation behaviour of metals by mapping intra-granular orientation gradients as a function of plastic deformation Lind et al, 2014;Pokharel et al, 2015;Toda et al, 2016) and measuring grain-resolved stresses associated with deformation twinning in hexagonal close packed metals (Abdolvand et al, 2015a(Abdolvand et al, , 2015bAydiner et al, 2009;Bieler et al, 2014;, but also processes such as grain nucleation (West et al, 2009), growth (Poulsen et al, 2011;Schmidt et al, 2004Schmidt et al, , 2008 and coarsening (Dake et al, 2016;Sharma et al, 2012), crack evolution (Cerrone et al, 2015;Chatterjee et al, 2015;Oddershede et al, 2012;Ozturk et al, 2016), stress relaxation (Tang et al, 2015), creep (Schuren et al, 2015) and phase transformations (Barton and Bernier, 2012;Hedström et al, 2010;Offerman et al, 2006) have been investigated using 3DXRD. For completeness applications of 3DXRD to minerals (Borthwick et al, 2012;Hall and Wright, 2015;Sørensen et al, 2012a), deep earth science (Nisr et al, 2014(Nisr et al, , 2012Rosa et al, 2015), nuclear materials (Brown et al, 2014;X. Zhang et al, 2015), superalloys (Sedmák et al, 2016) and ferroelectrics Majkut et al, 2016;Varlioglu et al, 2010) should also be mentioned.…”

3d X-Ray Diffraction Microscopy

“…The example relates to a study made of natural chalk by the NanoGeoScience group at the University of Copenhagen (Sørensen et al, 2012a). Chalk primarly consists of calcite, CaCO 3 , but can contain a number of other minerals, such as clays and quartz.…”

“…A combined data set enables the methodology to be extended to multiphase materials, by first segmenting the volume to be reconstructed based on density and then applying the 3DXRD method to each phase at a time. This idea has recently been generalized to provide the first (primitive) example of a novel concept, totalcrystallography, defined as the simultaneous characterization of the 3D atomic, and the 3D grain-scale structure of polycrystalline samples with unknown phase(s) (Sørensen et al, 2012a).…”

“…Their postions are superpositioned on a density map of the same sample generated by X-ray tomography. Adapted fromSørensen et al (2012a).…”

Resolution dependence of petrophysical parameters derived from X-ray tomography of chalk

“…All samples consist almost exclusively of calcite, although we have seen other minerals, e.g., barite, in some of the samples (not included here 14 ). Figure 2 shows data from samples A and B at the four voxel dimensions.…”