The EA Signal tests registered during the static stretching of the X6CrNiTi18-10 steel (according to EN 10088) have been o included in the work. The tests were done in the room temperature and in the high temperature of – 400 C on the universal strength (tensile) machine ZDM-5 with the range of 0-50 kN equipped with the digital registration of the strength and stretching. The analysis of the EA signal intensity has been conducted, depending on the deformation of the sample and test temperature. On the basis of the EA signal there have been the own characteristic oscillation frequencies of the samples designated, being the effect of the degradation of the structure as a result of the increased load.
Author: Bochnowski W.
THERMAL STRESSES IN THE BLADES WITH AND WITHOUT TBC BASED ON THE TEMPERATURE DISTRIBUTIONS MEASURED USING THERMAL IMAGING CAMERA
Turbine blades used in the jet engines are subjected to frequent and rapid temperature changes. As a result of the hot gases influence the temperatures excess 1000°C. Certain conditions for the blades generate local thermal stresses. In this paper the thermal stresses are calculated on base on experimental measurements of the temperature distributions using the high resolution thermal imaging camera FLIR SC7000 registered the distribution of temperature field for the blades with TBC and without TBC. The distribution of stresses in the blades based on the collected measurement data has been calculated. The calculations were made using FEM method implemented in COMSOL.