Temperature effects on turbine blades subjected to fatigue-creep interaction load

الملخص EN

This work is devoted to study experimentally fatigue – creep interaction with temperature on low stage steam turbine blade for GE turbine blade in Baghdad south power plant.

Prior to carry the test a chemical and tensile test are done to the blade to investigate some required properties such yield stress, elongations which will fed to the fatigue –creep interaction test.

An electrical furnace was designed and used to enclose the blade specimen and adjusting and simulate the temperature in real which is ranged between (50-250) °C.

a theoretical model is studied and suggested.

The results show; Increasing temperature (up to 250°C) will be causes a decrees in the mechanical properties by (40.05% , 45.16% and 87.44% ) in Ultimate tensile stress, Yield stress and Young's modules respectively.

Also, Increasing temperature to 250°C will be causes a decrees in the endurance limit of the steam turbine blade by 87.82% (from 38 to 250°C).