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Updated: Nov 10, 2025
Ultrasonic Fatigue Testing in the Tension-Compression Mode
Published on: March 7, 2018
A Novel Method for High Temperature Fatigue Testing of Nickel Superalloy Turbine Blades with Additional NDT
Dominik Kukla1, Mateusz Kopec1,2, Ryszard Sitek3
1Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw, Poland.
Abstract:
In this paper, a novel method for high temperature fatigue strength assessment of nickel superalloy turbine blades after operation at different times (303 and 473 h) was presented. The studies included destructive testing (fatigue testing at temperature 950 °C under cyclic bending load), non-destructive testing (Fluorescent Penetrant Inspection and Eddy Current method), and finite element modelling. High temperature fatigue tests were performed within load range from 5200 to 6600 N using a special self-designed blade grip attached to the conventional testing machine. The experimental results were compared with the finite element model generated from the ANSYS software. It was found that failure of turbine blades occurred in the area with the highest stress concertation, which was accurately predicted by the finite element (FE) model.
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