Abstract
In the study, the monosemousness of cyclic thermal plastic strain is found on the thermal fatigue life in the thermal fatigue test of ferrite ductile cast iron. Therefore, the monosemousness in the thermal fatigue phenomenon is discussed here. First, the meaning of monosemousness in thermal fatigue is described. Next, the monosemousness of thermal fatigue is proofing to formula and, then, it is verified by the thermal fatigue test. By doing so, the feature on the thermal fatigue of ferrite ductile cast iron is clarified.
