OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 24 No. 4 2022 Fig. 10. Main elements of ID19: 1 – undulator U32; 2 – wiggler W150; 3 – revolver U32/U17; 4 – Optics Hutch 1; 5 – attenuators; 6 – Optics Hutch 2; 7 – double-crystal monochromator; 8 – Experimental Hutch; 9 – multilayer monochromator; 10 – high-resolution tomograph; 11 – Custom: space for additional instruments, such as a laminograph, horizontal diffractometer, etc: 12 – medium-resolution tomography [28]. The lower row of numerical values corresponds to the distance from the radiation source, in meters Ta b l e 2 Composition of aluminum alloy (wt. %) Si Fe Cu Mn Mg Cr Zn Ti Al Rest ≤0.5 ≤0.5 3.8–4.9 0.3–0.9 1.2–1.8 0.1 0.25 0.15 90.7–94.7 0.05–0.15 When studying materials with laminography, the axis of rotation of the sample was tilted with respect to the direction of the X-ray beam at an angle of ~65° (Fig. 12). A pink beam from an undulator (period 13 mm) with a peak X-ray energy of ~26 keV, which was filtered with an aluminum plate 5.6 mm thick, was used for this research. These parameters provided a compromise between the penetrating power of X-rays and the contrast of the generated image [31]. During the research the sample mounted in the grips of the tensile machine rotated 360°. A single rotation step was 0.1°. Thus, the process of scanning one sample involved obtaining and subsequent processing of 3,599 X-ray patterns. The exposure time for each X-ray was 50 ms. X-ray patterns were processed using the filtered back projection algorithm to reconstruct the 3D image [32]. In addition to the statistical processing of defects in the structure of the material, an in-depth Fig. 11. Sketch of the specimen with the selected area. The red dots denote the position of the extensometer used to measure the displacement of the deformable zones [30]
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