Abstract
This paper presents results of strain energy ΔWpl cumulation tests on cast steel specimens under constant-amplitude isothermal stress conditions and programed block stress conditions at three different temperatures (20, 400, 600°C). Programed loads (blocks) were composed of five stages of different sequences which included the same strain as during the constant-amplitude isothermal tests. Through the constant-amplitude tests the author demonstrated effect of temperature and the strain level on the fatigue life, strain energy value ΔWpl and accumulated energy ΣΔWpl. While no influence of the load program form on the value of the energy accumulated in the specimen was found.
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