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

被引：9

作者：

Mussi, Alexandre ^{[1
]}

Gallet, Julien ^{[1
,4
]}

Castelnau, Olivier ^{[2
]}

Cordier, Patrick ^{[1
,3
]}

机构：

[1] Univ Lille, CNRS, INRAE, Cent Lille,UMR 8207,UMET,Unite Mat & Transformat, F-59000 Lille, France

[2] HESAM Univ, CNAM, CNRS, Lab PIMM,Arts & Metiers Inst Technol, 151 Blvd Hop, F-75013 Paris, France

[3] Inst Univ France, 1 Rue Descartes, F-75005 Paris, France

[4] Univ Claude Bernard Lyon1, CNRS, INSA, Mat Ingn & Sci,UMR 5510, F-69621 Villeurbanne, France

来源：

TECTONOPHYSICS | 2021年 / 803卷

基金：

欧洲研究理事会;

关键词：

TEM; Plasticity; Dislocation; Tomography; Electron-beam sensitive material; Quartz; Climb; von Mises criterion; BURGERS VECTOR; SLIP SYSTEMS; PREFERRED ORIENTATIONS; SCREW DISLOCATIONS; FABRIC TRANSITIONS; SINGLE-CRYSTALS; DEFORMATION; POLYCRYSTALS; PLASTICITY; MICROSCOPY;

D O I：

10.1016/j.tecto.2021.228754

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

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.

引用

页数：9

共 45 条

[1]

BAETA RD, 1969, AM MINERAL, V54, P1551

[2] DEFORMATION OF QUARTZITE [J].