@misc{ShapovalovGaalHoenigetal., author = {Shapovalov, Oleg and Gaal, Mate and H{\"o}nig, Gerald and Gradt, Thomas and Weiß, Sabine}, title = {Temperature dependence of the propagation speed of a longitudinal wave in different solids for use as a wedge material in an extreme-temperature-resistant ultrasonic transducer}, series = {Proceedings of the 23rd International Congress on Acoustics : integrating 4th EAA Euroregio 2019 : 9-13 September 2019 in Aachen, Germany}, volume = {2019}, journal = {Proceedings of the 23rd International Congress on Acoustics : integrating 4th EAA Euroregio 2019 : 9-13 September 2019 in Aachen, Germany}, editor = {Ochmann, Martin and Vorl{\"a}nder, Michael and Fels, Janina}, address = {Aachen}, isbn = {978-3-939296-15-7}, issn = {2226-7808}, doi = {10.18154/RWTH-CONV-239953}, pages = {4754 -- 4760}, abstract = {In special cases of angle beam ultrasonic measurement - e.g. defect detection in hot solids as well as flow measurement of liquid gases or energy storage mediums [1] - the applied transducer has to withstand extreme temperatures. Since the irradiation angle into the specific material is determined not only by wedge design, but also by the speed of sound in both the wedge material and the tested object, the developer must take into account the speed of the wave propagation in a wedge material over the whole temperature range of transducers application. In this study we investigate the temperature dependence of the speed of longitudinal wave propagation in 10 different materials in the range from -200 °C to 400 °C. The investigated materials belong to different material classes (ceramics, glass, as well as ferrous and non-ferrous metals) and are all temperature-resistant up to at least 600 °C, and therefore applicable as wedge materials in an ultrasonic transducer for use at extreme temperatures.}, language = {en} }