Modeling of experimentally observed topological defects inside bulk polycrystals

A rigorous methodology is developed for computing elastic fields generated by experimentally observed defect structures within grains in a polycrystal that has undergone tensile extension. An example application is made using a near-field high energy x-ray diffraction microscope measurement of a zir...

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Bibliographic Details
Published in:Modelling and simulation in materials science and engineering 2023-12, Vol.31 (8), p.85007
Main Authors: Singh, Siddharth, Liu, He, Arora, Rajat, Suter, Robert M, Acharya, Amit
Format: Article
Language:English
Subjects:
elasticity
high energy diffraction microscopy
polycrystal
topological defects
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Summary:A rigorous methodology is developed for computing elastic fields generated by experimentally observed defect structures within grains in a polycrystal that has undergone tensile extension. An example application is made using a near-field high energy x-ray diffraction microscope measurement of a zirconium sample that underwent 13.6 % tensile extension from an initially well-annealed state. (Sub)grain boundary features are identified with apparent disclination line defects in them. The elastic fields of these features identified from the experiment are calculated.
ISSN:0965-0393
1361-651X
DOI:10.1088/1361-651X/acff7c