Statistical assessment of the reliability of prediction of the fatigue strength of alloy KhN55MVTs using a temperature-time relationship

A procedure is presented for statistical assessment of the reliability of the prediction of the cyclic longevity of a high-temperature alloy using Fisher’s variance ratio and the Student t-test. It is demonstrated on the example of the high-temperature alloy KhN55MVTs that when certain conditions are met, a phenomenological type of temperature-time relationship ensures statistically reliable prediction of cyclic longevity under multicycle fatigue.