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- W2797989013 abstract "The ability to measure 3D orientation fields and to determine grain boundary character plays a key role in understanding many material science processes, including: crack formation and propagation, grain coarsening, and corrosion processes. X-ray diffraction imaging techniques offer the ability to retrieve such information in a non-destructive manner. Among them, Diffraction Contrast Tomography (DCT) is a monochromatic beam, near-field technique, that uses an extended beam and offers fast mapping of 3D sample volumes. It was previously shown that the six-dimensional extension of DCT can be applied to moderately deformed samples (≤ 5% total strain), made from materials that exhibit low levels of elastic deformation of the unit cell (≤ 1%). In this article, we improved over the previously proposed 6D-DCT reconstruction method, through the introduction of both a more advanced forward model and reconstruction algorithm. The results obtained with the proposed improvements are compared against the reconstructions previously published in [1], using Electron Backscatter Diffraction (EBSD) measurements as a reference. The result was a noticeably higher quality reconstruction of the grain boundary positions and local orientation fields. The achieved reconstruction quality, together with the low acquisition times, render DCT a valuable tool for the stop-motion study of polycrystalline microstructures, evolving as a function of applied strain or thermal annealing treatments, for selected materials." @default.
- W2797989013 created "2018-04-24" @default.
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- W2797989013 date "2018-04-11" @default.
- W2797989013 modified "2023-10-14" @default.
- W2797989013 title "Advances in 6d diffraction contrast tomography" @default.
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- W2797989013 doi "https://doi.org/10.1088/1748-0221/13/04/c04017" @default.
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