Publication: Low cycle fatigue behaviour of a 1Cr-Mo-V steel with bainite and ferrite microstructure
Date
01-01-1987
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Abstract
A 1Cr-Mo-V turbine rotor steel forging, heat treated to obtain a bainite-20% ferrite microstructure, has been investigated for low cycle fatigue behaviour at room temperature and 535°C. In addition to establishing life expectancy curves, cyclic stress response and cyclic stress/strain curves were derived and the influence of time-dependent effects on high temperature low cycle fatigue life was also determined by introducing varying hold times at the peak tensile strain level of the fatigue cycle. The life expectancy curve obtained is comparable to that reported for the bainitic structure in this steel. Introduction of a dwell period of 5 min is found to reduce the low cycle fatigue life by a factor of 1.6. © 1987.
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Keywords
Cr-Mo-V steel, fatigue, high temperatures, hold times, life expectancy curves, low cycle fatigue, stress/strain response