Thermophysical properties of a Ni alloy

Conference Dates

July 17-21, 2016


Thermophysical properties are important input data for the design of construction parts. By employing these data for modeling one can calculate the temperature as well as the thermomechanical stress distribution inside a part. Important variables for modelling are thermal conductivity/diffusivity, thermal expansion and specific heat.

The thermal conductivity (l(T)) of a material can be calculated by the equation:

l(T) = a(T) * cp(T) * r(T) [1]

With :

a(T) thermal diffusivity, cp(T) specific heat and r(T) density

In this contribution the methods LFA (Laser Flash Analysis), dilatometry and DSC (Differential Scanning Calorimetry) will be explained. The thermophysical measurement results received from a Ni alloy (Hastelloy) will be shown and interpreted. Due to its chemical resistance and especially high temperature stability this material is used for aircraft and gas turbine parts.

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