### $Id$ ###
[TWIP_Steel_FeMnC]

elasticity          hooke
plasticity          dislotwin

#(output)           edge_density
#(output)           dipole_density
#(output)           shear_rate_slip
#(output)           accumulated_shear_slip
#(output)           mfp_slip
#(output)           resolved_stress_slip
#(output)           threshold_stress_slip
#(output)           twin_fraction
#(output)           shear_rate_twin
#(output)           accumulated_shear_twin
#(output)           mfp_twin
#(output)           resolved_stress_twin
#(output)           threshold_stress_twin
#(output)           shear_rate_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 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]
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]

### Twinning parameters ###
Ntwin               12
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 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