Determination of Thermal Diffusivity of Austenitic Steel Using Pulsed Infrared Thermography

Abstract

The simple method of determining thermal diffusivity of solid materials at room temperature using the pulsed infrared thermography (IRT) is proposed. The theoretical basis of the method and experimental results are presented. The study was conducted on austenitic steel 316L. The obtained results show that the thermal diffusivity value of the tested steel determined by means of pulsed infrared thermography is very approximate to the values given in the literature, obtained by using more complicated methods. The differences between these values are 0.5%.Keywords: thermal diffusivity, pulsed infrared thermography, heat conduction, austenitic steel W niniejszej pracy przedstawiono prostą metodę wyznaczania dyfuzyjności cieplnej ciał stałych w temperaturze pokojowej przy wykorzystaniu aktywnej termografii podczerwieni. Zaprezentowane zostały teoretyczne podstawy metody oraz wyniki badań doświadczalnych. Badanie przeprowadzono dla stali austenitycznej 316L. Otrzymane rezultaty pokazują, że wyznaczona wartość dyfuzyjności cieplnej badanej stali jest bardzo bliska wartościom podanym w literaturze, otrzymanym za pomocą bardziej skomplikowanych metod. Różnica między tymi wartościami sięga zaledwie 0,5%.

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