Influence of Temperature History on Creep

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In the present paper, the influence of temperature history on transient stage creep is discussed. The experiments were made employing a 0.15 per cent carbon steel and the results were interpreted by analysis. When the temperature is elevated quickly during a creep test, there appears a temporary increase in the strain and its increment is slightly larger than the value estimated by neglecting the influence of temperature history, in other words, from the concept of "mechanical equation of state in solid". On the contrary, when the temperature is lowered quickly from a certain value, we see a temporary retardation of creep which is called "incubation period"or "induction period". When the temperature variation is periodic, the both effects cancel each other and the combined influence is not so serious as to defy application in mechanics problems.
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