2021-02-25 00:40:40 +05:30
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TWIP_Steel_FeMnC:
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2021-02-24 23:06:06 +05:30
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lattice: cF
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mechanics:
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2021-02-25 00:40:40 +05:30
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elasticity: {type: hooke, C_11: 175.0e9, C_12: 115.0e9, C_44: 135.0e9}
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2021-02-24 23:06:06 +05:30
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plasticity:
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type: dislotwin
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2021-02-25 00:40:40 +05:30
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output: [rho_mob, rho_dip, gamma_sl, Lambda_sl, tau_pass, f_tw, Lambda_tw, tau_hat_tw, f_tr]
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2021-02-24 23:06:06 +05:30
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D: 2.0e-5
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N_sl: [12]
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b_sl: [2.56e-10]
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rho_mob_0: [1.0e12]
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rho_dip_0: [1.0]
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2021-02-26 03:40:45 +05:30
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v_0: [1.0e4]
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2021-02-24 23:06:06 +05:30
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Q_s: [3.7e-19]
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p_sl: [1.0]
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q_sl: [1.0]
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tau_0: [1.5e8]
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2021-02-25 00:40:40 +05:30
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i_sl: [10.0] # Adj. parameter controlling dislocation mean free path
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D_0: 4.0e-5 # Vacancy diffusion prefactor / m^2/s
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D_a: 1.0 # minimum dipole distance / b
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Q_cl: 4.5e-19 # Activation energy for climb / J
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2021-02-24 23:06:06 +05:30
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h_sl_sl: [0.122, 0.122, 0.625, 0.07, 0.137, 0.122] # Interaction coefficients (Kubin et al. 2008)
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2021-02-25 00:40:40 +05:30
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# shear band parameters
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2021-02-24 23:06:06 +05:30
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xi_sb: 180.0e6
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Q_sb: 3.7e-19
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p_sb: 1.0
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q_sb: 1.0
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2021-02-25 00:40:40 +05:30
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v_sb: 0.0 # set to 0, to turn it off
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# twinning parameters
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2021-02-24 23:06:06 +05:30
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N_tw: [12]
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2021-02-25 00:40:40 +05:30
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b_tw: [1.47e-10] # Burgers vector length of twin system / b
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t_tw: [5.0e-8] # Twin stack mean thickness / m
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L_tw: 442.0 # Length of twin nuclei / b
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x_c_tw: 1.0e-9 # critical distance for formation of twin nucleus / m
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V_cs: 1.67e-29 # cross slip volume / m^3
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2021-02-24 23:06:06 +05:30
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p_tw: [10.0] # r-exponent in twin formation probability
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i_tw: 1.0 # Adj. parameter controlling twin mean free path
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2021-02-25 00:40:40 +05:30
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h_sl_tw: [0.0, 1.0, 1.0] # dislocation-twin interaction coefficients
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h_tw_tw: [0.0, 1.0] # twin-twin interaction coefficients
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Gamma_sf_0K: -0.0396 # stacking fault energy / J/m^2 at zero K; TWIP steel: -0.0526; Cu: -0.0396
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dGamma_sf_dT: 0.0002 # temperature dependence / J/(m^2 K) of stacking fault energy
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