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Application of electron tomography of dislocations in beam-sensitive quartz to the determination of strain components

Article dans une revue avec comité de lecture
Author
MUSSI, Alexandre
1002334 Unité Matériaux et Transformations - UMR 8207 [UMET]
GALLET, Julien
1002334 Unité Matériaux et Transformations - UMR 8207 [UMET]
CASTELNAU, Olivier
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
CORDIER, Patrick
1002334 Unité Matériaux et Transformations - UMR 8207 [UMET]

URI
http://hdl.handle.net/10985/19945
DOI
10.1016/j.tecto.2021.228754
Date
2021
Journal
Tectonophysics

Abstract

In this study we apply electron tomography of dislocations to quartz with a view to assess whether the von Mises-Taylor criterion is satisfied or violated in a deformed crystal of quartz. We propose a method to perform electron tomography with few projected images which allows extension of this technique to beam-sensitive materials such as quartz. The 3D characterization of the dislocation microstructure allows the evaluation of contributions to dislocation mobility with no ambiguity. From the geometrical characteristics of the dislocations and their Burgers vectors, we show how to identify the non-zero components of the strain tensor. We show that in the quartz grain investigated, the von-Mises-Taylor criterion is satisfied thanks to the climb of 〈c + a〉 dislocations.

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