Module “ttt_diagram”

class tc_python.property_model_definitions.ttt_diagram.TTTDiagram

Bases: object

Encapsulation class for the “TTT Diagram” property model Arguments, ArgumentOptions, and Results.

ArgumentOptions

alias of TTTDiagram_ArgumentOptions

Arguments

alias of TTTDiagram_Arguments

Results

alias of TTTDiagram_Results

classmethod get_aliases() → list[str]

List of aliases for “TTT Diagram” property model.

classmethod get_name() → str

String name of “TTT Diagram” property model.

class tc_python.property_model_definitions.ttt_diagram.TTTDiagram_ArgumentOptions

Bases: object

Valid options for TTT Diagram property model arguments which requires specific options to be entered.

AUSTENITE_COMPOSITION

alias of TTTDiagram_ArgumentOptions_AUSTENITE_COMPOSITION

CALCULATION_SETTING

alias of TTTDiagram_ArgumentOptions_CALCULATION_SETTING

CARBIDE_IN_BAINITE

alias of TTTDiagram_ArgumentOptions_CARBIDE_IN_BAINITE

CARBIDE_IN_PEARLITE

alias of TTTDiagram_ArgumentOptions_CARBIDE_IN_PEARLITE

FERRITE_MODE

alias of TTTDiagram_ArgumentOptions_FERRITE_MODE

PEARLITE_CRITERION

alias of TTTDiagram_ArgumentOptions_PEARLITE_CRITERION

PEARLITE_MODE

alias of TTTDiagram_ArgumentOptions_PEARLITE_MODE

class tc_python.property_model_definitions.ttt_diagram.TTTDiagram_ArgumentOptions_AUSTENITE_COMPOSITION

Bases: ArgumentBase

Valid options for TTTDiagram_Arguments.AUSTENITE_COMPOSITION.

EQUILIBRIUM = 'Equilibrium composition'

Use equilibrium composition at the specified austenitizing temperature.

NOMINAL = 'Nominal composition'

Use nominal alloy composition as austenite composition.

class tc_python.property_model_definitions.ttt_diagram.TTTDiagram_ArgumentOptions_CALCULATION_SETTING

Bases: ArgumentBase

Valid options for TTTDiagram_Arguments.CALCULATION_SETTING.

ACCURATE = 'Accurate'

Accurate calculation preset.

CUSTOM = 'Custom'

Custom settings.

QUICK = 'Quick'

Quick calculation preset.

class tc_python.property_model_definitions.ttt_diagram.TTTDiagram_ArgumentOptions_CARBIDE_IN_BAINITE

Bases: ArgumentBase

Valid options for TTTDiagram_Arguments.CARBIDE_IN_BAINITE.

CEMENTITE = 'CEMENTITE'

Bainite carbide: CEMENTITE.

M7C3 = 'M7C3'

Bainite carbide: M7C3.

class tc_python.property_model_definitions.ttt_diagram.TTTDiagram_ArgumentOptions_CARBIDE_IN_PEARLITE

Bases: ArgumentBase

Valid options for TTTDiagram_Arguments.CARBIDE_IN_PEARLITE.

CEMENTITE = 'CEMENTITE'

Pearlite carbide: CEMENTITE_D011 phase.

M23C6 = 'M23C6'

Pearlite carbide: M23C6.

M7C3 = 'M7C3'

Pearlite carbide: M7C3.

class tc_python.property_model_definitions.ttt_diagram.TTTDiagram_ArgumentOptions_FERRITE_MODE

Bases: ArgumentBase

Valid options for TTTDiagram_Arguments.FERRITE_MODE.

FASTER_START = 'Faster start'

Mode between OE and PE which gives a higher initial transformation rate.

OE_ONLY = 'OE only'

Orthoequilibrium (OE) mode considers local equilibrium conditions.

PE_ONLY = 'PE only'

Paraequilibrium (PE) mode for ferrite transformation.

PE_OVER_OE = 'PE if possible, otherwise OE'

Use Paraequilibrium (PE) mode if the PE driving force positive; otherwise use Orthoequilibrium (OE) mode.

class tc_python.property_model_definitions.ttt_diagram.TTTDiagram_ArgumentOptions_PEARLITE_CRITERION

Bases: ArgumentBase

Valid options for TTTDiagram_Arguments.PEARLITE_CRITERION.

MAXIMIZE_GIBBS_DISSIPATION_RATE = 'MaximizeGibbsEnergyDissipationRate'

Maximize the Gibbs energy dissipation rate of the pearlite transformation.

MAXIMIZE_GROWTH_RATE = 'MaximizeGrowthRate'

Maximize the growth rate of the pearlite transformation.

class tc_python.property_model_definitions.ttt_diagram.TTTDiagram_ArgumentOptions_PEARLITE_MODE

Bases: ArgumentBase

Valid options for TTTDiagram_Arguments.PEARLITE_MODE.

OPTIMAL = 'OptimalPearlite'

Optimal mode for pearlite transformation selected between PE and OE.

ORTHO = 'Ortho-pearlite'

  • Orthoequilibrium (OE) mode for pearlite transformation.

  • Orthoequilibrium (OE) mode considers local equilibrium conditions.

PARA = 'Para-pearlite'

Paraequilibrium (PE) mode for pearlite transformation.

class tc_python.property_model_definitions.ttt_diagram.TTTDiagram_Arguments

Bases: ArgumentBase

Valid entries for TTT Diagram property model arguments.

AUSTENITE_COMPOSITION = 'Austenite composition from'

  • Argument which sets the composition of the austenite phase.

Argument options:

TTTDiagram.ArgumentOptions.AUSTENITE_COMPOSITION

Default value:

TTTDiagram.ArgumentOptions.AUSTENITE_COMPOSITION.NOMINAL

AUSTENITIZING_TEMPERATURE = 'Annealing temperature'
Default value:

1000 [K]

CALCULATION_SETTING = 'Calculation setting'

  • Setting for transformation products and numerical settings for time integration.

Argument options:

TTTDiagram.ArgumentOptions.CALCULATION_SETTING

Default value:

TTTDiagram.ArgumentOptions.CALCULATION_SETTING.QUICK

CARBIDE_IN_BAINITE = 'Carbide in bainite'

  • Select the carbide to be present in bainite, which usually depends on Cr content.

Argument options:

TTTDiagram.ArgumentOptions.CARBIDE_IN_BAINITE

Default value:

TTTDiagram.ArgumentOptions.CARBIDE_IN_BAINITE.CEMENTITE

CARBIDE_IN_PEARLITE = 'Carbide in pearlite'

  • Select the carbide to be present in pearlite, which usually depends on Cr content.

  • If M23C6 is selected, parameters optimized for stainless steels will be invoked.

Argument options:

TTTDiagram.ArgumentOptions.CARBIDE_IN_PEARLITE

Default value:

TTTDiagram.ArgumentOptions.CARBIDE_IN_PEARLITE.CEMENTITE

ERROR_TOLERANCE_XA = 'Error tolerance for austenite volume fraction'

  • Tolerance controlling integration error of austenite fraction.

  • Time-integration error for austenite fraction cannot exceed this value.

Default value:

5e-4

EVALUATION_TEMPERATURE = 'Evaluation temperature'

  • Temperature at which the property evaluation occurs, corresponds to the measurement temperature.

  • This argument can also be set with PropertyModelCalculation.set_temperature(PropertyModelQuantity.evaluation_temperature())()

Default value:

1000.0 [K]

FERRITE_MODE = 'Ferrite mode'

  • Mode for ferrite transformation.

Argument options:

TTTDiagram.ArgumentOptions.FERRITE_MODE

Default value:

TTTDiagram.ArgumentOptions.FERRITE_MODE.FASTER_START

GRAIN_SIZE = 'GrainSize'

  • Grain size of austenite in micrometers.

Default value:

100.0 [μm]

INTERPOLATION_ERROR_TOLERANCE = 'Interpolation error tolerance'

  • Relative error tolerance used for interpolation grids.

  • Large error tolerance leads to quick but less accurate calculations, small error tolerance does the opposite.

  • This argument is used if TTTDiagram_Arguments.USE_INTERPOLATION is set to True

Default value:

0.1

MAX_DELTA_X_ABS = 'Maximum change of phase fraction (absolute)'

  • Absolute maximum change of phase fraction allowed per time step.

Default value:

5e-3

MAX_DELTA_X_REL = 'Maximum change of phase fraction (relative)'

  • Relative maximum change of phase fraction allowed per time step.

Default value:

5e-3

PEARLITE_CRITERION = 'Pearlite criterion'

  • Criterion to determine pearlite growth rate and lamellar spacing.

Argument options:

TTTDiagram.ArgumentOptions.PEARLITE_CRITERION

Default value:

TTTDiagram.ArgumentOptions.PEARLITE_CRITERION.MAXIMIZE_GROWTH_RATE

PEARLITE_MODE = 'PearliteMode'

  • Mode for pearlite transformation.

Argument options:

TTTDiagram.ArgumentOptions.PEARLITE_MODE

Default value:

TTTDiagram.ArgumentOptions.PEARLITE_MODE.OPTIMAL

SELECT_BAINITE = 'Bainite'

  • Option to include bainite in TTT calculation.

Argument options:

True, False

Default value:

True

SELECT_FERRITE = 'Ferrite'

  • Option to include ferrite in TTT calculation.

Argument options:

True, False

Default value:

True

SELECT_MARTENSITE = 'Martensite'

  • Option to include martensite in TTT calculation.

Argument options:

True, False

Default value:

True

SELECT_PEARLITE = 'Pearlite'

  • Option to include pearlite in TTT calculation.

Argument options:

True, False

Default value:

True

USE_INTERPOLATION = 'Use interpolation when necessary'

  • Enable/disable interpolation of growth/nucleation rates based on error tolerance.

Argument options:

True, False

Default value:

True

class tc_python.property_model_definitions.ttt_diagram.TTTDiagram_Results

Bases: ArgumentBase

Valid entries for TTT Diagram property model results.

AUSTENITE_10 = '10% austenite transformed'

Time at which 10% of the austenite phase has transformed.

AUSTENITE_90 = '90% austenite transformed'

Time at which 90% of the austenite phase has transformed.

AUSTENITE_FINISH = '98% austenite transformed'

Time at which 98% of the austenite phase has transformed (austenite “finish”).

AUSTENITE_HALF = '50% austenite transformed'

Time at which 50% of the austenite phase has transformed.

AUSTENITE_START = '2% austenite transformed'

Time at which 2% of the austenite phase has transformed (austenite “start”).

BAINITE_START = 'Bainite start (2%)'

Time at which 2% of bainite has transformed (bainite “start”).

FERRITE_START = 'Ferrite start (2%)'

Time to reach 2% ferrite transformation (ferrite “start”).

MARTENSITE_FINISH = 'Martensite 98%'

98% martensite temperature.

MARTENSITE_HALF = 'Martensite 50%'

50% martensite temperature.

MARTENSITE_START = 'Martensite start'

Time at which martensite begins to form (martensite “start”).

PEARLITE_START = 'Pearlite start (2%)'

Time at which 2% of pearlite has transformed (pearlite “start”).

TERMINAL_FRACTION_BAINITE = 'Terminal fraction of bainite'

Terminal fraction of the bainite phase.

TERMINAL_FRACTION_FERRITE = 'Terminal fraction of ferrite'

Terminal fraction of the ferrite phase.

TERMINAL_FRACTION_MARTENSITE = 'Terminal fraction of martensite'

Terminal fraction of martensite phase.

TERMINAL_FRACTION_PEARLITE = 'Terminal fraction of pearlite'

Terminal fraction of the pearlite phase.

TERMINAL_FRACTION_TOTAL_FERRITE = 'Terminal fraction of total ferrite'

Terminal fraction of total ferrite.

TERMINAL_FRACTION_TOTAL_FERRITE_CEMENTITE = 'Terminal fraction of total ferrite+cementite'

Terminal fraction of total ferrite + cementite.

TOTAL_FERRITE_CEMENTITE_FINISH = 'Total ferrite+cementite finish (98%)'

Time at which 98% of the sum of pearlite and cementite-containing bainite phases have transformed (i.e., transformation “finish”).

TOTAL_FERRITE_CEMENTITE_START = 'Total ferrite+cementite start (2%)'

Time at which 2% of the sum of polygonal ferrite and bainitic ferrite phases have transformed (i.e., transformation “start”).

TOTAL_FERRITE_START = 'Total ferrite start (2%)'

Time at which 2% of ferrite has transformed (ferrite “start”).