Téléchargements (Bridgmanite, MgO)

 

Bridgmanite

 

Here we consider deformation of bridgmanite by dislocation glide along two slip systems: [100] glide in (010) and [010] glide in (100)

 



[100](010) [010](100)

 

The following data are from the PhD thesis of Antoine Kraych. They have been published in:

A. Kraych, Ph. Carrez & P. Cordier (2016) On dislocation glide in MgSiO3 bridgmanite, Earth and Planetary Science Letters, 452, 60-68, doi: 10.1016/j.epsl.2016.07.035 :

 

Please cite these references if you use the data

Mechanical data based on a dislocation density ρ=1013 m-2 are more adapted to describe experiments under laboratory condtions (high stresses, laboratory strain rates) than those based on a dislocation density ρ=108 m-2 (see below).

 

Dislocation glide in Bridgmanite - Critical resolved shear stresses based on a dislocation density ρ=1013 m-2

 

 

  • 30 GPa

dε/dt = 10-4 s-1

dε/dt = 10-5 s-1

dε/dt = 10-6 s-1

Data 100 - Data 010 Data 100 - Data 010 Data 100 - Data 010

 

  • 60 GPa

dε/dt = 10-4 s-1

dε/dt = 10-5 s-1

dε/dt = 10-6 s-1

Data 100 - Data 010 Data 100 - Data 010 Data 100 - Data 010

 

 

Dislocation glide in Bridgmanite - Critical resolved shear stresses based on a dislocation density ρ=108 m-2

 

 

  • 30 GPa

dε/dt = 10-14 s-1

dε/dt = 10-15 s-1

dε/dt = 10-16 s-1

Data 100 - Data 010 Data 100 - Data 010 Data 100 - Data 010

 

  • 60 GPa

dε/dt = 10-14 s-1

dε/dt = 10-15 s-1

dε/dt = 10-16 s-1

Data 100 - Data 010 Data 100 - Data 010 Data 100 - Data 010

 

 

 

MgO

 

MgO deforms along the 1/2<110> directions is several families of planes. Among them, the basal (100) and diagonal (110) planes are the easiest for plastic glide.

In the following, "100" and "110" will refer to these planes.

 

Dislocation glide in MgO - Critical resolved shear stresses at dε/dt = 10-4 s-1 (dislocation density ρ=1012 m-2)

 

The following data are from the PhD thesis of Jonathan Amodeo. They have been published in:

J. Amodeo, Ph. Carrez, & P. Cordier (2012) Modeling the effect of pressure on the critical shear stress of MgO single crystals. Philosophical Magazine, 92(12), 1523-1541. Doi:10.1080/14786435.2011.652689

Please cite this reference if you use the data

 

  • 300 K

Data

 

Dislocation glide in MgO - Critical resolved shear stresses based on a dislocation density ρ=1012 m-2

 

The following data are from the PhD thesis of Jonathan Amodeo. They have been published in:

J. Amodeo, Ph. Carrez, B. Devincre & P. Cordier (2011) Multiscale modelling of MgO plasticity. Acta Materialia, 59, 2291-2301 [doi:10.1016/j.actamat.2010.12.020]

and

P. Cordier, J. Amodeo & Ph. Carrez (2012) Modelling the rheology of MgO under Earth’s mantle pressure, temperature and strain-rates. Nature 481, 177-180 [doi: 10.1038/nature10687]

Please cite these references if you use the data

Mechanical data based on a dislocation density ρ=1012 m-2 are more adapted to describe experiments under laboratory condtions (high stresses, laboratory strain rates) than those based on a dislocation density ρ=108 m-2 (see below).

 

 

  • 0 GPa

Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110
Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110
Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110

 

 

  • 30 GPa

Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110
Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110
Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110

 

 

  • 60 GPa

Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110
Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110
Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110

 

 

  • 100 GPa

Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110
Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110
Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110

 

 

 

 

Dislocation glide in MgO - Critical resolved shear stresses based on a dislocation density ρ=108 m-2

 

The following data are from the PhD thesis of Jonathan Amodeo. They have been published in:

J. Amodeo, Ph. Carrez, B. Devincre & P. Cordier (2011) Multiscale modelling of MgO plasticity. Acta Materialia, 59, 2291-2301 [doi:10.1016/j.actamat.2010.12.020]

and

P. Cordier, J. Amodeo & Ph. Carrez (2012) Modelling the rheology of MgO under Earth’s mantle pressure, temperature and strain-rates. Nature 481, 177-180 [doi: 10.1038/nature10687]

Please cite these references if you use the data

Mechanical data based on a dislocation density ρ=108 m-2 are more adapted to describe natural condtions (low stresses, very low strain rates).

 

 

  • 0 GPa

Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110
Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110
Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110

 

 

  • 30 GPa

Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110
Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110
Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110

 

 

  • 60 GPa

Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110
Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110
Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110

 

 

  • 100 GPa

Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110
Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110
Data 100 - Data 110 Data 100 - Data 110 Data 100 - Data 110