Abstract
A large-scale database MSDRD on mechanical properties of structural materials such as metals, composites and ceramics were constructed by The Research Group for Statistical Aspects of Materials Strength. In the previous paper, fatigue data of structural steels in a wide range of strength level were analysed from a statistical view point and it was reported that distribution characteristics of the fatigue life were distinctly affected by the strength level. Thus, main target of this work was focused on fatigue data of high strength steels compiled in the above database and statistical fatigue properties were analysed in particular attention to the effect of heat treatment conditions. It was finally found that the distribution pattern of the fatigue life for high strength steels was classified into single-mode and mixed-mode Weibull distributions depending on the strength level governed by the tempering temperature.
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