2015-01-15 16:26:15 +05:30
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[Tungsten]
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elasticity hooke
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#plasticity dislotwin
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#plasticity dislokmc
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plasticity disloucla
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### Material parameters ###
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lattice_structure bcc
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C11 523.0e9 # From Marinica et al. Journal of Physics: Condensed Matter(2013)
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C12 202.0e9
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C44 161.0e9
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grainsize 2.7e-5 # Average grain size [m] 2.0e-5
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SolidSolutionStrength 0.0 # Strength due to elements in solid solution
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### Dislocation glide parameters ###
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#per family
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Nslip 12 0
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slipburgers 2.72e-10 2.72e-10 # Burgers vector of slip system [m]
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rhoedge0 1.0e12 1.0e12 # Initial edge dislocation density [m/m**3] 1.0e12
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rhoedgedip0 1.0 1.0 # Initial edged dipole dislocation density [m/m**3]
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Qedge 2.725e-19 2.725e-19 # Activation energy for dislocation glide [J]
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v0 3693.4 755.59 # Initial glide velocity [m/s] 1.0e-4 (kmC 3693.4 ; 755.59)
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p_slip 0.86 0.22 # p-exponent in glide velocity
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q_slip 1.69 1.01 # q-exponent in glide velocity
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u_slip 2.47 0.38 # u-exponent of stress pre-factor (kmC)
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s_slip 0.00 0.50 # self hardening in glide velocity (kmC)
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tau_peierls 2.03e9 2.03e9 # peierls stress [Pa]
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#nonschmid_a1 1.00 1.00 # a1 coeff. non schmid law
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#nonschmid_a2 0.00 0.00 # a2 coeff. non schmid law
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#mobility law
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kink_height 2.567e-10 2.567e-10 # kink height sqrt(6)/3*lattice_parameter [m]
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omega 9.1e11 9.1e11 # attemp frequency (from kMC paper) [s^(-1)]
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kink_width 29.95e-10 29.95e-10 # kink pair width ~ 11 b (kMC paper) [m]
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dislolength 78.0e-10 78.0e-10 # dislocation length (ideally lambda) [m] initial value 25b
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2015-01-16 04:12:56 +05:30
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friction_coeff 8.3e-5 8.3e-5 # friction coeff. B (kMC) [Pa*s]
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2015-01-15 16:26:15 +05:30
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#
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#hardening
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dipoleformationfactor 0 0 # to have hardening due to dipole formation off
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CLambdaSlip 10.0 10.0 # Adj. parameter controlling dislocation mean free path
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D0 4.0e-5 4.0e-5 # Vacancy diffusion prefactor [m**2/s]
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Qsd 4.5e-19 4.5e-19 # Activation energy for climb [J]
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Catomicvolume 1.0 1.0 # Adj. parameter controlling the atomic volume [in b]
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Cedgedipmindistance 1.0 1.0 # Adj. parameter controlling the minimum dipole distance [in b]
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interaction_slipslip 0.0625 0.0625 0.72 0.05 0.09 0.06 # Queyreau
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nonschmid_coefficients 0 0.56 0.75 0 0 0 #??????????????
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