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3D grain mapping by laboratory X-ray diffraction contrast tomography implemented on a conventional tomography setup

Abstract : Abstract Non-destructive 3D characterization of grain orientations, shapes and sizes, i.e. grain mapping, offers immense opportunities for studying microstructural evolution in polycrystalline materials. In addition to a number of well-established grain mapping techniques available at synchrotron facilities, a polychromatic variant - laboratory diffraction contrast tomography (LabDCT) - using lab-based x-rays, has been developed and commercialized. Yet, the product is bounded to a specific instrument and requires a commercial license, which limits the use on widely available laboratory instruments. To promote the availability of LabDCT, we have developed a grain reconstruction method and implemented it on a conventional X-ray tomography setup at the SIMaP laboratory for LabDCT grain mapping. First, we tested the grain reconstruction algorithm by comparing an input virtual grain structure and a reconstructed volume using the forward simulated diffraction projections from the input structure. Then, we experimentally characterized an AlCu alloy sample using LabDCT and validated the grain mapping result by a grain reconstruction from synchrotron DCT measurement. Last, perspectives on further development of generalizing LabDCT technique on conventional tomography setups are discussed.
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https://hal.archives-ouvertes.fr/hal-03765727
Contributor : Pierre LHUISSIER Connect in order to contact the contributor
Submitted on : Wednesday, August 31, 2022 - 2:12:39 PM
Last modification on : Friday, September 30, 2022 - 11:40:09 AM
Long-term archiving on: : Thursday, December 1, 2022 - 7:25:16 PM

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H Fang, R Granger, W Ludwig, Pierre Lhuissier. 3D grain mapping by laboratory X-ray diffraction contrast tomography implemented on a conventional tomography setup. IOP Conference Series: Materials Science and Engineering, 2022, 1249 (1), pp.012039. ⟨10.1088/1757-899X/1249/1/012039⟩. ⟨hal-03765727⟩

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