A technique for recording polycrystalline structure and orientation during in situ deformation cycles of rock analogues using an automated fabric analyser |
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Authors: | Peternell M Russell-Head D S Wilson C J L |
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Affiliation: | School of Earth Sciences, The University of Melbourne, Victoria, Australia. mark.peternell@mytum.de |
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Abstract: | Two in situ plane-strain deformation experiments on norcamphor and natural ice using synchronous recording of crystal c-axis orientations have been performed with an automated fabric analyser and a newly developed sample press and deformation stage. Without interrupting the deformation experiment, c-axis orientations are determined for each pixel in a 5 × 5 mm sample area at a spatial resolution of 5 μm/pixel. In the case of norcamphor, changes in microstructures and associated crystallographic information, at a strain rate of ~2 × 10(-5) s(-1), were recorded for the first time during a complete in situ deformation-cycle experiment that consisted of an annealing, deformation and post-deformation annealing path. In the case of natural ice, slower external strain rates (~1 × 10(-6) s(-1)) enabled the investigation of small changes in the polycrystal aggregate's crystallography and microstructure for small amounts of strain. The technical setup and first results from the experiments are presented. |
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Keywords: | c‐axis orientation deformation stage fabric analyser ice in situ experiment norcamphor rock analogue |
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