DAMASK_EICMD/config/Phase_Dislotwin_TWIP-Steel-...

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### $Id$ ###
[TWIP_Steel_FeMnC]
elasticity hooke
plasticity dislotwin
#(output) edge_density
#(output) dipole_density
#(output) shearrate_slip
#(output) accumulated_shear_slip
#(output) mfp_slip
#(output) resolved_stress_slip
#(output) threshold_stress_slip
#(output) twin_fraction
#(output) shearrate_twin
#(output) accumulated_shear_twin
#(output) mfp_twin
#(output) resolved_stress_twin
#(output) threshold_stress_twin
#(output) shearrate_shearband
#(output) resolved_stress_shearband
#(output) sb_eigenvalues
#(output) sb_eigenvectors
### Material parameters ###
lattice_structure fcc
C11 175.0e9 # From Music et al. Applied Physics Letters 91, 191904 (2007)
C12 115.0e9
C44 135.0e9
grainsize 2.0e-5 # Average grain size [m]
SolidSolutionStrength 1.5e8 # Strength due to elements in solid solution
### Dislocation glide parameters ###
Nslip 12
slipburgers 2.56e-10 # Burgers vector of slip system [m]
rhoedgedip0 1.0 # Initial dislocation density [m/m**3]
rhoedge0 1.0e12 # Initial dislocation density [m/m**3]
v0 1.0e-4 # Initial glide velocity [m/s]
Qedge 3.7e-19 # Activation energy for dislocation glide [J]
p_slip 1.0 # p-exponent in glide velocity
q_slip 1.0 # q-exponent in glide velocity
# hardening of glide
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)
### Shearband parameters ###
shearbandresistance 180e6
shearbandvelocity 1e-4 # set to zero to turn shear banding of
QedgePerSbSystem 3.7e-19 # Activation energy for shear banding [J]
p_shearband 1.0 # p-exponent in glide velocity
q_shearband 1.0 # q-exponent in glide velocity
### Twinning parameters ###
Ntwin 12
twinburgers 1.47e-10 # Burgers vector of twin system [m]
twinsize 5.0e-8 # Twin stack mean thickness [m]
L0_twin 442.0 # Length of twin nuclei in Burgers vectors
maxtwinfraction 1.0 # Maximum admissible twin volume fraction
xc_twin 1.0e-9 # critical distance for formation of twin nucleus
VcrossSlip 1.67e-29 # cross slip volume
r_twin 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 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