Science Advances

Supplementary Materials

This PDF file includes:

  • Materials and Methods
  • Fig. S1. Stereographic plot (planes) of the beam strained in the microscope as viewed along the electron beam direction.
  • Fig. S2. FIB preparation of olivine specimens for in situ TEM nanomechanical testing.
  • Fig. S3. SEM measurements of the cross-sectional area of the tensile sample.
  • Fig. S4. True stress–true strain curve of olivine sample deformed elastically up to 3.4 GPa and 0.021 strain.
  • Fig. S5. WBDF-TEM imaging of dislocations.
  • Fig. S6. Force cycles applied to the sample “DefOl-3.”
  • Fig. S7. Experimental procedure used to measure the velocity of dislocations at low resolved shear stresses in sample “DefOl-4.”
  • Fig. S8. Critical stress for source opening as a function of the loop radius.
  • Fig. S9. Snapshots from in situ TEM tensile experiment at constant load of 365 μN applied on sample “DefOl-2.”
  • Fig. S10. Calculation of the image forces on a dislocation parallel to the free surfaces of a 200-nm-thick foil (green band).
  • Fig. S11. Example of the measurement of the velocity of a screw dislocation (segment arrowed) within a single cycle.
  • Fig. S12. Dislocation velocity as a function of the resolved shear stress: influence of the fit on the DD results.
  • Fig. S13. Influence of the initial dislocation density on the DD results.
  • Fig. S14. Influence on the dislocation length on the DD results.
  • Fig. S15. Histograms of the stresses experienced by the dislocations in the DD simulations and of the resulting strains.
  • Table S1. Intensity (and dhkl) of the most efficient reflections in olivine (calculated with the “electron diffraction” software).
  • Table S2. Summary of the in situ TEM tensile experiments achieved in the present study.
  • Legend for movie S1
  • References (33–35)

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Other Supplementary Material for this manuscript includes the following:

  • Movie S1 (.mp4 format). The in situ deformation of sample DefOl-3 under a constant load of 360 μN (resolved shear stress, 0.82 GPa).

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