Precipitation phase dissolve back into matrix during simulation
Posted: Wed Jul 10, 2019 2:15 pm
Hi, I have a Problem when I am trying to simulate the precipitation during cooling process.
I indeed define the nucleation of precipitation Phase, however, the precipitates dissolve back into the matrix during the Simulation process.
Part of input is shown below. Did I set any wrong parameter?
# Input for seed type 4:
# ----------------------
# Type of 'position' of the seeds?
# Options: bulk region interface triple quadruple front [restrictive]
interface
# Phase of new grains (integer) [unresolved|add_to_grain]?
2
# Reference phase (integer) [min. and max. fraction (real)]?
1
# Substrate phase [2nd phase in interface]?
1
# maximum number of new nuclei 4?
# (set negative for unlimited number)
100
# Grain radius [micrometers]?
0.3
# Choice of growth mode:
# Options: stabilisation analytical_curvature
stabilisation
# min. undercooling [K] (>0)?
0
# Shield effect:
# Shield time [s] [shield phase or group number] ?
50
# Shield distance [micrometers] [ nucleation distance [micrometers] ]?
10
# Nucleation range
# min. nucleation temperature for seed type 4 [K]
0.000000
# max. nucleation temperature for seed type 4 [K]
1323.5
# Time between checks for nucleation? [s]
# Options: constant from_file
constant
# Time interval [s]
1.50000E-02
# Shall random noise be applied?
# Options: nucleation_noise no_nucleation_noise
no_nucleation_noise
# Seed for random-number generator initialisation
# -----------------------------------------------
1
# Max. number of simultaneous nucleations?
# ----------------------------------------
# (set to 0 for automatic)
0
#
# Shall metastable small seeds be killed?
# ---------------------------------------
# Options: kill_metastable no_kill_metastable
no_kill_metastable
I indeed define the nucleation of precipitation Phase, however, the precipitates dissolve back into the matrix during the Simulation process.
Part of input is shown below. Did I set any wrong parameter?
# Input for seed type 4:
# ----------------------
# Type of 'position' of the seeds?
# Options: bulk region interface triple quadruple front [restrictive]
interface
# Phase of new grains (integer) [unresolved|add_to_grain]?
2
# Reference phase (integer) [min. and max. fraction (real)]?
1
# Substrate phase [2nd phase in interface]?
1
# maximum number of new nuclei 4?
# (set negative for unlimited number)
100
# Grain radius [micrometers]?
0.3
# Choice of growth mode:
# Options: stabilisation analytical_curvature
stabilisation
# min. undercooling [K] (>0)?
0
# Shield effect:
# Shield time [s] [shield phase or group number] ?
50
# Shield distance [micrometers] [ nucleation distance [micrometers] ]?
10
# Nucleation range
# min. nucleation temperature for seed type 4 [K]
0.000000
# max. nucleation temperature for seed type 4 [K]
1323.5
# Time between checks for nucleation? [s]
# Options: constant from_file
constant
# Time interval [s]
1.50000E-02
# Shall random noise be applied?
# Options: nucleation_noise no_nucleation_noise
no_nucleation_noise
# Seed for random-number generator initialisation
# -----------------------------------------------
1
# Max. number of simultaneous nucleations?
# ----------------------------------------
# (set to 0 for automatic)
0
#
# Shall metastable small seeds be killed?
# ---------------------------------------
# Options: kill_metastable no_kill_metastable
no_kill_metastable