armi.materials.ht9 module

Simple/academic/incomplete HT9 ferritic-martensitic stainless steel material.

This is a famous SFR cladding/duct material because it doesn’t void swell that much.

class armi.materials.ht9.HT9

Bases: Material

Simplified HT9 stainless steel.

Warning

This is an academic-quality material. When more detail is desired, a custom material should be implemented via a user-provided plugin.

[MFH] (1,2,3)

Metallic Fuels Handbook Hofman, G. L., Billone, M. C., Koenig, J. F., Kramer, J. M., Lambert, J. D. B., Leibowitz, L., Orechwa, Y., Pedersen, D. R., Porter, D. L., Tsai, H., and Wright, A. E. Metallic Fuels Handbook. United States: N. p., 2019. Web. doi:10.2172/1506477. https://www.osti.gov/biblio/1506477-metallic-fuels-handbook

propertyValidTemperature = {'linear expansion': ((293, 1050), 'K')}

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

setDefaultMassFracs()

HT9 mass fractions.

From E.2-1 of [MFH]. https://www.osti.gov/biblio/1506477-metallic-fuels-handbook

linearExpansionPercent(Tk=None, Tc=None)

Gets the linear expansion from E.2.2.2 in [MFH] for HT9.

The ref gives dL/L0 in percent and is valid from 293 - 1050 K.

thermalConductivity(Tk=None, Tc=None)

Thermal conductivity in W/m-K).

From [MFH], E.2.2.3, eq 5.

Tip

This can probably be sped up with a polynomial evaluator.

density(Tk: float = None, Tc: float = None) → float

Return density that preserves mass when thermally expanded in 3D (in g/cm^3).

Notes

Since refDens is specified at the material-dep reference case, we don’t need to specify the reference temperature. It is already consistent with linearExpansion Percent. - p*(dp/p(T) + 1) =p*( p + dp(T) )/p = p + dp(T) = p(T) - dp/p = (1-(1 + dL/L)**3)/(1 + dL/L)**3