Thermo-electro-mechanical modeling of thermal fatigue failure process of corset samples from single-crystal nickel-based superalloys

The results of computations of the thermal and stress-strain state of single-crystal corset specimens subjected to the action of periodic electric current, leading to variable inhomogeneous heating and subsequent thermal fatigue failure, are presented. The influence of maximum value and range of temperature and also delay time at the maximum temperature on the number of cycles before the macrocrack formation is investigated. Comparison of the computational results with the experimental data for various single-crystal nickel-based superalloys showed a good accuracy.