温度変動下のクリープ

抄録

Ordinary creep tests are usually performed at constant temperatures. A creep test under varying temperatures has not been studied in details. It is well-known that there are many cases where creep in the machine parts is caused under varying temperatures.
Thus employing 0.14% carbon steel, the authors investigated the creep behaviour under varying temperatures. It is found that the creep behaviour in such a condition can be predicted from the results obtained at constant temperatures, using the assumption that the idea of mechanical equation of state is applicable in this case, that is, the creep strain ε is determined by the strain rate dε/dt and the temperature T shown as
f(ε, dε/dt, T)=0.