Journal Highlight: Inception and movement of a 'subgrain boundary precursor' in ice under an applied stress, observed by X-ray synchrotron radiation Bragg imaging

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  • Published: Jul 6, 2015
  • Author: spectroscopyNOW
  • Channels: X-ray Spectrometry
thumbnail image: Journal Highlight: Inception and movement of a 'subgrain boundary precursor' in ice under an applied stress, observed by X-ray synchrotron radiation Bragg imaging
The first steps of a novel mechanism, with a moving subgrain boundary precursor region, have been investigated on an ice single crystal using synchrotron radiation Bragg diffraction imaging.

Inception and movement of a 'subgrain boundary precursor' in ice under an applied stress, observed by X-ray synchrotron radiation Bragg imaging

Journal of Applied Crystallography, 2015, 48, 672-678
A. Philip, L. Capolo, J. Meyssonnier and J. Baruchel

Abstract: Basal slip of dislocations, the easiest deformation mechanism of ice crystals, does not allow a response to any strain state. The first steps of another mechanism, with a moving subgrain boundary precursor region, which permits accommodating the effect of an applied load, is investigated on an ice single crystal, mainly using synchrotron radiation Bragg diffraction imaging. During this process, the evolution of the local integrated intensity shows that there is both a general multiplication of dislocations within the crystal and a movement of basal dislocations towards the surface. The 'subgrain boundary precursor' region evolves towards a classical grain boundary when further deformed.

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