### $Id$ ### [Tungsten] elasticity hooke plasticity dislotwin ### Material parameters ### lattice_structure bcc C11 523.0e9 # From Marinica et al. Journal of Physics: Condensed Matter(2013) C12 202.0e9 C44 161.0e9 grainsize 2.0e-5 # Average grain size [m] SolidSolutionStrength 1.5e8 # Strength due to elements in solid solution ### Dislocation glide parameters ### #per family Nslip 12 0 slipburgers 2.72e-10 # Burgers vector of slip system [m] rhoedge0 1.0e12 # Initial dislocation density [m/m**3] rhoedgedip0 1.0 # Initial dislocation density [m/m**3] v0 1.0e-4 # Initial glide velocity [m/s] Qedge 2.725e-19 # Activation energy for dislocation glide [J] pexponent 0.78 # p-exponent in glide velocity qexponent 1.58 # q-exponent in glide velocity tau_peierls 2.03e9 # peierls stress (for bcc) #hardening 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] 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) ### no shear banding, no twinning shearbandvelocity 0.0 # no shear banding Ntwin 0 # no shear banding ### Shearband parameters ### shearbandresistance 180e6 QedgePerSbSystem 3.7e-19 # Activation energy for shear banding [J] ### twinning parameter ### 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 0.0 0.0 # Dislocation-Twin interaction coefficients interactionTwinTwin 0.0 0.0 # 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