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edge dipole annihilation via climb is not disabled anymore when stress is zero

This commit is contained in:
Cathy Bing 2023-11-28 00:15:18 -05:00
parent 8427adcaec
commit 779a6e7a05
3 changed files with 28 additions and 25 deletions
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2
PRIVATE

@ -1 +1 @@
Subproject commit 2cfe059d411b00e62e005107c3031ec988b2cd84 Subproject commit 6f4a7a8598dfceae5c2178c8c2554245d8164cb2

9
src/phase_mechanical_plastic_dislotungsten.f90
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@ -357,8 +357,8 @@ module function dislotungsten_dotState(Mp,ph,en) result(dotState)
dot_gamma = abs(dot_gamma) dot_gamma = abs(dot_gamma)
where(dEq0(dot_gamma)) where(dEq0(dot_gamma))
d_hat = dst%Lambda_sl(:,en) ! upper limit
dot_rho_dip_formation = 0.0_pREAL dot_rho_dip_formation = 0.0_pREAL
dot_rho_dip_climb = 0.0_pREAL
else where else where
d_hat = math_clip(mu*prm%b_sl/(8.0_pREAL*PI*(1.0_pREAL-nu)*tau_eff), & d_hat = math_clip(mu*prm%b_sl/(8.0_pREAL*PI*(1.0_pREAL-nu)*tau_eff), &
left = prm%d_caron, & ! lower limit left = prm%d_caron, & ! lower limit
@ -366,9 +366,14 @@ module function dislotungsten_dotState(Mp,ph,en) result(dotState)
dot_rho_dip_formation = merge(dot_gamma * 2.0_pREAL*(d_hat-prm%d_caron)/prm%b_sl * stt%rho_mob(:,en), & dot_rho_dip_formation = merge(dot_gamma * 2.0_pREAL*(d_hat-prm%d_caron)/prm%b_sl * stt%rho_mob(:,en), &
0.0_pREAL, & 0.0_pREAL, &
prm%dipoleformation) prm%dipoleformation)
end where
where(dEq0(d_hat-prm%d_caron))
dot_rho_dip_climb = 0.0_pREAL
else where
v_cl = (3.0_pREAL*mu*prm%D_0*exp(-prm%Q_cl/(K_B*T))*prm%f_at/(2.0_pREAL*PI*K_B*T)) & v_cl = (3.0_pREAL*mu*prm%D_0*exp(-prm%Q_cl/(K_B*T))*prm%f_at/(2.0_pREAL*PI*K_B*T)) &
* (1.0_pREAL/(d_hat+prm%d_caron)) * (1.0_pREAL/(d_hat+prm%d_caron))
dot_rho_dip_climb = (4.0_pREAL*v_cl*stt%rho_dip(:,en))/(d_hat-prm%d_caron) ! ToDo: Discuss with Franz: Stress dependency? dot_rho_dip_climb = (4.0_pREAL*v_cl*stt%rho_dip(:,en))/(d_hat-prm%d_caron) ! ToDo: Discuss with Franz: Stress dependency?
end where end where
dot_rho_mob = dot_gamma / (prm%b_sl*dst%Lambda_sl(:,en)) & ! multiplication dot_rho_mob = dot_gamma / (prm%b_sl*dst%Lambda_sl(:,en)) & ! multiplication

42
src/phase_mechanical_plastic_dislotwin.f90
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@ -671,33 +671,31 @@ module function dislotwin_dotState(Mp,ph,en) result(dotState)
tau = math_tensordot(Mp,prm%P_sl(1:3,1:3,i)) tau = math_tensordot(Mp,prm%P_sl(1:3,1:3,i))
significantSlipStress: if (dEq0(tau) .or. prm%omitDipoles) then significantSlipStress: if (dEq0(tau) .or. prm%omitDipoles) then
d_hat = dst%Lambda_sl(i,en)
dot_rho_dip_formation(i) = 0.0_pREAL dot_rho_dip_formation(i) = 0.0_pREAL
dot_rho_dip_climb(i) = 0.0_pREAL
else significantSlipStress else significantSlipStress
d_hat = 3.0_pREAL*mu*prm%b_sl(i)/(16.0_pREAL*PI*abs(tau)) d_hat = math_clip(3.0_pREAL*mu*prm%b_sl(i)/(16.0_pREAL*PI*abs(tau)), &
d_hat = math_clip(d_hat, right = dst%Lambda_sl(i,en)) left = prm%d_caron(i), &
d_hat = math_clip(d_hat, left = prm%d_caron(i)) right = dst%Lambda_sl(i,en))
dot_rho_dip_formation(i) = 2.0_pREAL*(d_hat-prm%d_caron(i))/prm%b_sl(i) & dot_rho_dip_formation(i) = 2.0_pREAL*(d_hat-prm%d_caron(i))/prm%b_sl(i) &
* stt%rho_mob(i,en)*abs_dot_gamma_sl(i) * stt%rho_mob(i,en)*abs_dot_gamma_sl(i)
if (dEq(d_hat,prm%d_caron(i))) then
dot_rho_dip_climb(i) = 0.0_pREAL
else
! Argon & Moffat, Acta Metallurgica, Vol. 29, pg 293 to 299, 1981
sigma_cl = dot_product(prm%n0_sl(1:3,i),matmul(Mp,prm%n0_sl(1:3,i)))
if (prm%extendedDislocations) then
b_d = 24.0_pREAL*PI*(1.0_pREAL - nu)/(2.0_pREAL + nu) * prm%Gamma_sf%at(T) / (mu*prm%b_sl(i))
else
b_d = 1.0_pREAL
end if
v_cl = 2.0_pREAL*prm%omega*b_d**2*exp(-prm%Q_cl/(K_B*T)) &
* (exp(abs(sigma_cl)*prm%b_sl(i)**3/(K_B*T)) - 1.0_pREAL)
dot_rho_dip_climb(i) = 4.0_pREAL*v_cl*stt%rho_dip(i,en) &
/ (d_hat-prm%d_caron(i))
end if
end if significantSlipStress end if significantSlipStress
if (dEq(d_hat,prm%d_caron(i))) then
dot_rho_dip_climb(i) = 0.0_pREAL
else
! Argon & Moffat, Acta Metallurgica, Vol. 29, pg 293 to 299, 1981
sigma_cl = dot_product(prm%n0_sl(1:3,i),matmul(Mp,prm%n0_sl(1:3,i)))
if (prm%extendedDislocations) then
b_d = 24.0_pREAL*PI*(1.0_pREAL - nu)/(2.0_pREAL + nu) * prm%Gamma_sf%at(T) / (mu*prm%b_sl(i))
else
b_d = 1.0_pREAL
end if
v_cl = 2.0_pREAL*prm%omega*b_d**2*exp(-prm%Q_cl/(K_B*T)) &
* (exp(abs(sigma_cl)*prm%b_sl(i)**3/(K_B*T)) - 1.0_pREAL)
dot_rho_dip_climb(i) = 4.0_pREAL*v_cl*stt%rho_dip(i,en) &
/ (d_hat-prm%d_caron(i))
end if
end do slipState end do slipState
dot_rho_mob = abs_dot_gamma_sl/(prm%b_sl*dst%Lambda_sl(:,en)) & dot_rho_mob = abs_dot_gamma_sl/(prm%b_sl*dst%Lambda_sl(:,en)) &