Experimental Investigation of Creep Damage of a Thermally Exposed Component in Coal Power Plants
The task of this thesis is to investigate deterioration of the materials considering creep and damage. The components to be investigated are steam turbine penetrations, however the applied methodology is applicable to arbitrary types of creep resistant steels. Due to high temperature and stresses, material degradation such as creep deformation and damage are the most prominent problems when estimating the remaining lifetime of the components. In addition, the specific shape of the component leads to uneven distribution of the stresses, which in addition can be uniaxial as well as multiaxial. The investigation of the mechanical properties and the microstructure will thus allow for separating the effects of stress and temperature (as far as the two effects can be treated individually).