75 lines
3.6 KiB
Plaintext
75 lines
3.6 KiB
Plaintext
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### $Id$ ###
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[TWIP_Steel_FeMnC]
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elasticity hooke
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plasticity dislotwin
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#(output) edge_density
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#(output) dipole_density
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#(output) shearrate_slip
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#(output) accumulated_shear_slip
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#(output) mfp_slip
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#(output) resolved_stress_slip
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#(output) threshold_stress_slip
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#(output) twin_fraction
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#(output) shearrate_twin
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#(output) accumulated_shear_twin
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#(output) mfp_twin
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#(output) resolved_stress_twin
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#(output) threshold_stress_twin
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#(output) shearrate_shearband
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#(output) resolved_stress_shearband
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#(output) sb_eigenvalues
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#(output) sb_eigenvectors
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### Material parameters ###
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lattice_structure fcc
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C11 175.0e9 # From Music et al. Applied Physics Letters 91, 191904 (2007)
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C12 115.0e9
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C44 135.0e9
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grainsize 2.0e-5 # Average grain size [m]
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SolidSolutionStrength 1.5e8 # Strength due to elements in solid solution
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### Dislocation glide parameters ###
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Nslip 12
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slipburgers 2.56e-10 # Burgers vector of slip system [m]
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rhoedgedip0 1.0 # Initial dislocation density [m/m**3]
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rhoedge0 1.0e12 # Initial dislocation density [m/m**3]
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v0 1.0e-4 # Initial glide velocity [m/s]
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Qedge 3.7e-19 # Activation energy for dislocation glide [J]
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p_slip 1.0 # p-exponent in glide velocity
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q_slip 1.0 # q-exponent in glide velocity
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# hardening of glide
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CLambdaSlip 10.0 # Adj. parameter controlling dislocation mean free path
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D0 4.0e-5 # Vacancy diffusion prefactor [m**2/s]
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Qsd 4.5e-19 # Activation energy for climb [J]
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Catomicvolume 1.0 # Adj. parameter controlling the atomic volume [in b]
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Cedgedipmindistance 1.0 # Adj. parameter controlling the minimum dipole distance [in b]
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atol_rho 1.0
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interactionSlipSlip 0.122 0.122 0.625 0.07 0.137 0.122 # Interaction coefficients (Kubin et al. 2008)
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### Shearband parameters ###
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shearbandresistance 180e6
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shearbandvelocity 1e-4 # set to zero to turn shear banding of
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QedgePerSbSystem 3.7e-19 # Activation energy for shear banding [J]
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p_shearband 1.0 # p-exponent in glide velocity
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q_shearband 1.0 # q-exponent in glide velocity
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### Twinning parameters ###
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Ntwin 12
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twinburgers 1.47e-10 # Burgers vector of twin system [m]
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twinsize 5.0e-8 # Twin stack mean thickness [m]
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L0_twin 442.0 # Length of twin nuclei in Burgers vectors
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maxtwinfraction 1.0 # Maximum admissible twin volume fraction
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xc_twin 1.0e-9 # critical distance for formation of twin nucleus
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VcrossSlip 1.67e-29 # cross slip volume
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r_twin 10.0 # r-exponent in twin formation probability
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Cmfptwin 1.0 # Adj. parameter controlling twin mean free path
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Cthresholdtwin 1.0 # Adj. parameter controlling twin threshold stress
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interactionSlipTwin 0.0 1.0 1.0 # Dislocation-Twin interaction coefficients
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interactionTwinTwin 0.0 1.0 # Twin-Twin interaction coefficients
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atol_twinFrac 1.0e-7
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SFE_0K -0.0396 # stacking fault energy at zero K; TWIP steel: -0.0526; Cu: -0.0396
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dSFE_dT 0.0002 # temperature dependance of stacking fault energy
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