Structural changes during microstructural development in natural salt samples |
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| Institution: | 1. Physical–Technical Institute UB RAS, 132 Kirov Street, 426000 Izhevsk, Russia;2. Institute for Theoretical and Applied Electromagnetics RAS, 13 Izhorskaya ul., 125412 Moscow, Russia |
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| Abstract: | This paper presents the microstructural and structural properties of two natural salt samples from Iran and Portugal. Their strength-ductility behavior is explored by uniaxial compression experiments that, demonstrate that the observed differences lie not only in the inhomogeneous composition of the samples and their different grain sizes but also in their internal microstructural inhomogeneities. Microstructural inhomogeneities and substructural changes were observed with the SEM method (Scanning Electron Microscopy), the thin section microscope investigations and the EXAFS (Extended X-ray Absorption Fine Structure) spectroscopy. EBSD (Electron backscattered diffraction) analyses show maximum in the 100] or 110] directions in the inverse pole figure. This demonstrates that recrystallization and grain growth processes took place together. A weak 111] texture sometimes observed nearby indicates that residual stress is still present in the recrystallized sample.Comparison of the textural and structural results show that local structural rearrangements take place during textural development; this is attributed to different orientations influencing the deformation and recrystallization of adjacent grains influencing the bulk final texture. |
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| Keywords: | Natural salt samples Bulk texture EXAFS analyses Active slip systems Texture components |
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