During their operation, modern aircraft engine components are subjected to increasingly demanding operating conditions, especially the high pressure turbine (HPT) blades. Such conditions cause these parts to undergo different types of time-dependent degradation, one of which is creep. A model using the finite element method (FEM) was developed, in order to be able to predict the creep behaviour of HPT blades. Flight data records (FDR) for a specific aircraft, provided by a commercial aviation

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... mpany, were used to obtain thermal and mechanical data for three different flight cycles. In order to create the 3D model needed for the FEM analysis, a HPT blade scrap was scanned, and its chemical composition and material properties were obtained. The data that was gathered was fed into the FEM model and different simulations were run, first with a simplified 3D rectangular block shape, in order to better establish the model, and then with the real 3D mesh obtained from the blade scrap. The overall expected behaviour in terms of displacement was observed, in particular at the trailing edge of the blade. Therefore such a model can be useful in the goal of predicting turbine blade life, given a set of FDR data. Abstract Based on the failures analysis of screw propellers we defined quantitative characteristics of the damage. It is shown that most failures are related to the cracks formation and corrosion-erosion lesions. To increase fail safety and prolong product life cycle,we suggested forming a composite surface layer by means of multicomponent materials with shape memory effect (SME) by high-velocity oxy-fuel spraying in a single technological cycle. We supplied the results of stress-strain state (SSS) numerical studies of a screw propeller with nanostructured composite surface layer. Experimental studies of surface-modified samples for fatigue strength, wear resistance, corrosion resistance in seawater confirmed increase in performance characteristics. Abstract Based on the failures analysis of screw propellers we defined quantitative characteristics of the damage. It is shown that most failures are related to the cracks formation and corrosion-erosion lesions. To increase fail safety and prolong product life cycle,we suggested forming a composite surface layer by means of multicomponent materials with shape memory effect (SME) by high-velocity oxy-fuel spraying in a single technological cycle. We supplied the results of stress-strain state (SSS) numerical studies of a screw propeller with nanostructured composite surface layer. Experimental studies of surface-modified samples for fatigue strength, wear resistance, corrosion resistance in seawater confirmed increase in performance characteristics.