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Title of Journal: Int J Thermophys

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Abbravation: International Journal of Thermophysics

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Springer US

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DOI

10.1016/0022-3115(72)90009-8

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1572-9567

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Thermal Diffusivity and Thermal Conductivity of Fi

Authors: B Wilthan W Schützenhöfer G Pottlacher
Publish Date: 2015/02/18
Volume: 36, Issue: 8, Pages: 2259-2272
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Abstract

The need for characterization of thermophysical properties of steel and nickelbased alloys was addressed in the FFGBridge Project 810999 in cooperation with a partner from industry Böhler Edelstahl GmbH  Co KG To optimize numerical simulations of production processes such as remelting or plastic deformation additional and more accurate data were necessary for the alloys under investigation With a fast ohmic pulse heating circuit system the temperaturedependent specific electrical resistivity density and specific heat capacity for a set of five high alloyed steels were measured Hence using the Wiedemann–Franz law with a Lorenz number of L =245times 108hbox V2cdot hbox K2 the thermal diffusivity and thermal conductivity could be calculated for the solid and liquid phases up to temperatures of 2500 K This experimental approach is limited by the following requirements for the specimens they have to be electrically conducting the melting point has to be high enough for the implemented pyrometric temperature measurement and one has to be able to draw wires of the material The latter restriction is technologically challenging with some of the materials being very brittle For all samples electrical and temperature signals are recorded and a fast shadowgraph method is used to measure the volume expansion For each material under investigation a set of data including the chemical composition the density at room temperature solidus and liquidus temperatures and the change of enthalpy resistivity density thermal conductivity and thermal diffusivity as a function of temperature is reported

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  2. Measurements and Correlations of cis -1,3,3,3-Tetrafluoroprop-1-ene (R1234ze(Z)) Subcooled Liquid Density and Vapor-Phase PvT
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  4. Study on Reducing the Size-of-Source Effect of Pyrometers
  5. Radiative Properties of Gold Surfaces with One-Dimensional Microscale Gaussian Random Roughness
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  7. Development and Applications of Continuous-Wave Cavity Ring-Down Spectroscopy
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