Method for recording microstructural changes in a component
AssigneeSiemens Aktiengesellschaft
InventorsMichael Dankert, Martin Feldhege, Stefan Irmisch, Matthias Oechsner, Eckart Schumann, Werner Stamm
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Abstract
The microstructure of components, particularly layer systems, deteriorates under excessive thermal and/or mechanical stress. Previous test methods are destructive, parts being cut out of the layer system and being microstructurally analyzed. The inventive method allows a deterioration to be determined by means of special, simple non-destructive measurements that are repeated at specific intervals using a mechanical indenter test, for example.
Claims21
1-21. (canceled)
A method for recording microstructural changes in a layer system component, comprising:
- measuring a material parameter of the component a plurality of times,
- wherein the material parameter is selected from the group consisting of:
- electrical capacitance, thermal conductivity, specific heat capacity, peltier coefficient, magnetic susceptibility, ferroelectricity, pyroelectricity, ultrasound or mechanical indenter test.
A method for recording microstructural changes in a turbine component, comprising:
- providing a turbine component having a layer system where the layer system is a turbine component having:
- a super alloy substrate,
- a bond coat arranged on the substrate, and
- an MCrAlX layer where M stands for at least one element selected from the group consisting of iron, cobalt or nickel and X stands for yttrium, silicon or at least one rare earth element;
- measuring a material parameter of the component a first time, the material parameter selected from the group consisting of:
- electrical capacitance, thermal conductivity, specific heat capacity, peltier coefficient, magnetic susceptibility, ferroelectricity, pyroelectricity, ultrasound or mechanical indenter test;
- recording the first measured parameter on a recording device;
- and
- re-measuring the material parameter of the component a second time after the component has been operated in the turbine.
Dependencies are inferred from the claim text.