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The broadening of diffraction peak profiles of plastically deformed face-centred cubic and hexagonal close-packed alloys, and results of the Warren-Averbach method, are shown to be dependent on the measurement direction. Polycrystal plasticity models are used to show that these changes could be due to the heterogeneity of deformation, which results in differences in the types of dislocations and dislocation structures in different orientations, highlighting how errors can result from the use of an unweighted contrast factor.

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A polycrystalline commercially pure sample of titanium has been measured using near-field and far-field three-dimensional X-ray diffraction techniques. The indexing results obtained with two different software packages (DCT and ImageD11) are compared.
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