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updated TWIP steel data set to have only 2 slip system families, added data set for tungsten

This commit is contained in:
Martin Diehl 2014-03-11 10:34:36 +00:00
parent 0363b1fb04
commit c2e81414e3
2 changed files with 76 additions and 11 deletions
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24
code/config/Phase_Dislotwin_TWIP_Steel_FeMnC.config
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@ -31,17 +31,19 @@ grainsize 2.0e-5 # Average grain size [m]
SolidSolutionStrength 1.5e8 # Strength due to elements in solid solution
### Dislocation glide parameters ###
Nslip 12 0 0 0
slipburgers 2.56e-10 0 0 0 # Burgers vector of slip system [m]
rhoedge0 1.0e12 0 0 0 # Initial dislocation density [m/m**3]
rhoedgedip0 1.0 0 0 0 # Initial dislocation density [m/m**3]
Qedge 3.7e-19 0 0 0 # Activation energy for dislocation glide [J]
v0 1.0e-4 0 0 0 # Initial glide velocity [m/s]
CLambdaSlip 10.0 0 0 0 # Adj. parameter controlling dislocation mean free path
Nslip 12 0
slipburgers 2.56e-10 0 # Burgers vector of slip system [m]
rhoedgedip0 1.0 0 # Initial dislocation density [m/m**3]
rhoedge0 1.0e12 0 # Initial dislocation density [m/m**3]
v0 1.0e-4 0 # Initial glide velocity [m/s]
Qedge 3.7e-19 0 # Activation energy for dislocation glide [J]
pexponent 1.0 1.0 # p-exponent in glide velocity
qexponent 1.0 1.0 # q-exponent in glide velocity
tau_peierls 0.0 # Peierls stress (only used for bcc materials)
# hardening of glide
CLambdaSlip 10.0 0 # Adj. parameter controlling dislocation mean free path
D0 4.0e-5 # Vacancy diffusion prefactor [m**2/s]
Qsd 4.5e-19 # Activation energy for climb [J]
pexponent 1.0 # p-exponent in glide velocity
qexponent 1.0 # q-exponent in glide velocity
Catomicvolume 1.0 # Adj. parameter controlling the atomic volume [in b]
Cedgedipmindistance 1.0 # Adj. parameter controlling the minimum dipole distance [in b]
atol_rho 1.0
@ -49,7 +51,7 @@ interactionSlipSlip 0.122 0.122 0.625 0.07 0.137 0.122 # Interaction coefficient
### Shearband parameters ###
shearbandresistance 180e6
shearbandvelocity 1e-4
shearbandvelocity 1e-4 # set to zero to turn shear banding of
QedgePerSbSystem 3.7e-19 # Activation energy for shear banding [J]
### Twinning parameters ###
@ -68,4 +70,4 @@ interactionSlipTwin 0.0 1.0 1.0 # Dislocation-Twin interaction coefficients
interactionTwinTwin 0.0 1.0 # Twin-Twin interaction coefficients
atol_twinFrac 1.0e-7
SFE_0K -0.0396 # stacking fault energy at zero K; TWIP steel: -0.0526; Cu: -0.0396
dSFE_dT 0.0002 # temperature dependance of stacking fault energy
dSFE_dT 0.0002 # temperature dependance of stacking fault energy

63
code/config/Phase_Dislotwin_Tungsten.config Normal file
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@ -0,0 +1,63 @@
### $Id$ ###
[Tungsten]
elasticity hooke
plasticity dislotwin
### Material parameters ###
lattice_structure bcc
C11 523.0e9 # From Marinica et al. Journal of Physics: Condensed Matter(2013)
C12 202.0e9
C44 161.0e9
grainsize 2.0e-5 # Average grain size [m]
SolidSolutionStrength 1.5e8 # Strength due to elements in solid solution
### Dislocation glide parameters ###
#per family
Nslip 12 0
slipburgers 2.72e-10 # Burgers vector of slip system [m]
rhoedge0 1.0e12 # Initial dislocation density [m/m**3]
rhoedgedip0 1.0 # Initial dislocation density [m/m**3]
v0 1.0e-4 # Initial glide velocity [m/s]
Qedge 2.725e-19 # Activation energy for dislocation glide [J]
pexponent 0.78 # p-exponent in glide velocity
qexponent 1.58 # q-exponent in glide velocity
tau_peierls 2.03e9 # peierls stress (for bcc)
#hardening
CLambdaSlip 10.0 # Adj. parameter controlling dislocation mean free path
D0 4.0e-5 # Vacancy diffusion prefactor [m**2/s]
Qsd 4.5e-19 # Activation energy for climb [J]
Catomicvolume 1.0 # Adj. parameter controlling the atomic volume [in b]
Cedgedipmindistance 1.0 # Adj. parameter controlling the minimum dipole distance [in b]
atol_rho 1.0
interactionSlipSlip 0.122 0.122 0.625 0.07 0.137 0.122 # Interaction coefficients (Kubin et al. 2008)
### no shear banding, no twinning
shearbandvelocity 0.0 # no shear banding
Ntwin 0 # no shear banding
### Shearband parameters ###
shearbandresistance 180e6
QedgePerSbSystem 3.7e-19 # Activation energy for shear banding [J]
### twinning parameter ###
twinburgers 1.47e-10 # Burgers vector of twin system [m]
twinsize 5.0e-8 # Twin stack mean thickness [m]
L0 442.0 # Length of twin nuclei in Burgers vectors
maxtwinfraction 1.0 # Maximum admissible twin volume fraction
Ndot0 0.0 # Number of potential sources per volume per time [1/m**3.s]
xc 1.0e-9 # critical distance for formation of twin nucleus
VcrossSlip 1.67e-29 # cross slip volume
rexponent 10.0 # r-exponent in twin formation probability
Cmfptwin 1.0 # Adj. parameter controlling twin mean free path
Cthresholdtwin 1.0 # Adj. parameter controlling twin threshold stress
interactionSlipTwin 0.0 0.0 0.0 # Dislocation-Twin interaction coefficients
interactionTwinTwin 0.0 0.0 # Twin-Twin interaction coefficients
atol_twinFrac 1.0e-7
SFE_0K -0.0396 # stacking fault energy at zero K; TWIP steel: -0.0526; Cu: -0.0396
dSFE_dT 0.0002 # temperature dependance of stacking fault energy