Thermomechanical fatigue curves for boiler steels (original) (raw)

Strength of Materials, 1981

Abstract

Conclusions1.Results of tests on three boiler steels for TMF under rigid loading are more correctly approximated by two straight lines on semilogarithmic coordinates of endurance to failure-stress amplitude per cycle. The upper, steeply falling straight line intersects the lower gently sloping line at some central point.2.A break is observed on thermomechanical fatigue curves on the coordinates logarithm of endurance Nf-stress range. A relationship is observed between the path of the curves for logNf(Δσ) and logNf(Δɛ) which indicate the existence of a physical prerequisite for breaks and discontinuities in thermomechanical fatigue curves.

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