Abstract
Super heater tubes are subjected to alternate heating and cooling
in power plants causes crack and eventually fail. This phenomenon
is termed as thermal fatigue. In this paper, a laboratory
simulation for reproducing thermal fatigue phenomenon is developed
to determine the number of cycles of failure occurs in super
heater tubes. Thermal fatigue tests are conducted in
Non-Destructive Tested T23 base and SMAW welded tubes separately.
The tubes are subjected to thermal cycles from 800∘C (accelerated temperature) to room temperature
(28∘C). In this work 800∘C is selected in order to achieve the crack much
earlier. The selected temperature is just below the