Modeling of experimentally observed topological defects inside bulk polycrystals

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Modeling of experimentally observed topological defects inside bulk polycrystals

A rigorous methodology is developed for computing elastic fields generated byexperimentally observed defect structures within grains in a polycrystal that has undergone tensileextension. An example application is made using a near-field High Energy X-ray DiffractionMicroscope measurement of a zirconium sample that underwent 13.6% tensile extension from aninitially well-annealed state. (Sub)grain boundary features are identified with apparent disclinationline defects in them. The elastic fields of these features identified from the experiment are calculated.