DAMASK_EICMD/examples/ConfigFiles/Phase_Dislotwin_TWIP-Steel-FeMnC.config

[TWIP_Steel_FeMnC]

elasticity          hooke
plasticity          dislotwin

(output)           rho_mob
(output)           rho_dip
(output)           gamma_sl
(output)           lambda_sl
(output)           tau_pass
(output)           f_tw
(output)           lambda_tw
(output)           tau_hat_tw
(output)           f_tr


### 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^3]
Cedgedipmindistance 1.0             # Adj. parameter controlling the minimum dipole distance [in b]
interactionSlipSlip 0.122 0.122 0.625 0.07 0.137 0.122 # Interaction coefficients (Kubin et al. 2008)

### Shearband parameters ###
shearbandresistance 180e6
shearbandvelocity   0e-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
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