Using electron backscatter diffraction patterns to examine recrystallization in polar ice sheets
نویسندگان
چکیده
منابع مشابه
Dynamic Recrystallization of Ice in Polar Ice Sheets
The deformation and recrystallization mechanisms which control the viscoplasticity of ice from polar ice sheets have been investigated. The high plastic anisotropy of ice crystals is responsible for the development of a non uniform internal stress field within the polycrystal. Strain-shadows produced by sub-grain are observed in polarized light when the rotation recrystallization regime is domi...
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Partially recrystallized samples of 5352 aluminum alloy and pure titanium were sectioned and characterized with automated electron backscatter diffraction (EBSD) in a scanning electron microscope. Pixels were partitioned into recrystallized (annealed state) and unrecrystallized (deformed state) using a criterion based on the confidence index (CI) and the diffraction pattern quality (IQ). Unrecr...
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We report the first use of direct detection for recording electron backscatter diffraction patterns. We demonstrate the following advantages of direct detection: the resolution in the patterns is such that higher order features are visible; patterns can be recorded at beam energies below those at which conventional detectors usefully operate; high precision in cross-correlation based pattern sh...
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The present study investigates the crystal preferred orientation (CPO) of quartz crystals in psammitic rocks to ascertain the deformationmechanism using electron backscatter diffraction (EBSD) on quartz crystals from north of the Renvyle-Bofin Slide (RBS) nearLetterfrack in western Ireland. Complete crystallographic orientations were determined for several thousand individual quartz crystalsin ...
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Global temperatures have increased by 0.8◦C since instrumental records began, and the last decade has been the warmest. This warming has been closely linked to increasing greenhouse gas concentrations due to human activities. Arctic warming is leading to thinning and disappearance of sea ice on the Arctic Ocean and the increased melting of the Greenland ice sheet. In the last decade the Antarct...
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ژورنال
عنوان ژورنال: Journal of Glaciology
سال: 2006
ISSN: 0022-1430,1727-5652
DOI: 10.3189/172756506781828458