armi.materials.inconel625 module

Inconel625

class armi.materials.inconel625.Inconel625

Bases: armi.materials.material.Material

name = 'Inconel625'

String identifying the material

propertyValidTemperature = {'heat capacity': ((221.0, 1093.0), 'C'), 'linear expansion': ((21.0, 927.0), 'C'), 'linear expansion percent': ((21.0, 927.0), 'C'), 'thermal conductivity': ((21.0, 982.0), 'C')}

Dictionary of valid temperatures over which the property models are valid in the format ‘Property Name’: ((Temperature_Lower_Limit, Temperature_Upper_Limit), Temperature_Units)

references = {'density': 'http://www.specialmetals.com/assets/documents/alloys/inconel/inconel-alloy-625.pdf', 'linearExpansion': 'http://www.specialmetals.com/assets/documents/alloys/inconel/inconel-alloy-625.pdf', 'linearExpansionPercent': 'http://www.specialmetals.com/assets/documents/alloys/inconel/inconel-alloy-625.pdf', 'mass fractions': 'http://www.specialmetals.com/assets/documents/alloys/inconel/inconel-alloy-625.pdf', 'specific heat': 'http://www.specialmetals.com/assets/documents/alloys/inconel/inconel-alloy-625.pdf', 'thermalConductivity': 'http://www.specialmetals.com/assets/documents/alloys/inconel/inconel-alloy-625.pdf'}

citation}

Type

The literature references {property

refTempK = 294.15

setDefaultMassFracs()

polyfitThermalConductivity(power=2)

Calculates the coefficients of a polynomial fit for thermalConductivity. Based on data from http://www.specialmetals.com/assets/documents/alloys/inconel/inconel-alloy-625.pdf Fits a polynomial to the data set and returns the coefficients.

Parameters

power (int, optional) – power of the polynomial fit equation

Return type

list of length ‘power’ containing the polynomial fit coefficients for thermal conductivity.

thermalConductivity(Tk=None, Tc=None)

Returns the thermal conductivity of Inconel625.

Parameters

• Tk (float, optional) – Temperature in Kelvin.

• Tc (float, optional) – Temperature in degrees Celsius.

Returns

thermalCond – thermal conductivity in W/m/C

Return type

float

polyfitHeatCapacity(power=2)

Calculates the coefficients of a polynomial fit for heatCapacity. Based on data from http://www.specialmetals.com/assets/documents/alloys/inconel/inconel-alloy-625.pdf Fits a polynomial to the data set and returns the coefficients.

Parameters

power (int, optional) – power of the polynomial fit equation

Return type

list of length ‘power’ containing the polynomial fit coefficients for heat capacity.

heatCapacity(Tk=None, Tc=None)

Returns the specific heat capacity of Inconel625.

Parameters

• Tk (float, optional) – Temperature in Kelvin.

• Tc (float, optional) – Temperature in degrees Celsius.

Returns

heatCapacity – heat capacity in J/kg/C

Return type

float

polyfitLinearExpansionPercent(power=2)

Calculates the coefficients of a polynomial fit for linearExpansionPercent. Based on data from http://www.specialmetals.com/assets/documents/alloys/inconel/inconel-alloy-625.pdf

Uses mean CTE values to find percent thermal strain values. Fits a polynomial to the data set and returns the coefficients.

Parameters

power (int, optional) – power of the polynomial fit equation

Return type

list of length ‘power’ containing the polynomial fit coefficients for linearExpansionPercent

linearExpansionPercent(Tk=None, Tc=None)

Returns percent linear expansion of Inconel625.

Parameters

• Tk (float) – temperature in (K)

• Tc (float) – Temperature in (C)

Return type

linExpPercent in %-m/m/C

linearExpansion(Tk=None, Tc=None)

From http://www.specialmetals.com/assets/documents/alloys/inconel/inconel-alloy-625.pdf

Using the correlation for linearExpansionPercent, the 2nd order polynomial is divided by 100 to convert from percent strain to strain, then differentiated with respect to temperature to find the correlation for instantaneous linear expansion.

i.e. for a linearExpansionPercent correlation of a*Tc**2 + b*Tc + c, the linearExpansion correlation is 2*a/100*Tc + b/100

2*(5.083e-7/100.0)*Tc + 1.125e-3/100.0

Parameters

• Tk (float) – temperature in (K)

• Tc (float) – Temperature in (C)

Return type

linExp in m/m/C