continuing from post #219
Metallurgy
2.1 TBC (Thermal Barrier Coating) Characterization (Combustion Chamber - Air Plasma Spray(APS))
Thermal and mechanical characterization of the thermal barrier coating which will be applied to the combustion chamber of the engine, will be determined. Lack of metallurgical and operational experience regarding to the thermal barrier coating, limits the design and manufacturing capabilities. Therefore, the objective of this project will be the investigation of the mechanisms affecting the microstructure of the thermal barrier coating and to determine the functionality of the thermal barrier coating .An APS method that allows a relatively thick coating on the combustion chamber will be investigated.
The inclusion of the work packages of the project is planned to be presented under the following main headings.
i. Characteristic determination: Determination of the measurable characteristics of the thermal barrier coating,
ii. Change of characteristic with heat: Determining the change in the characteristics of the thermal barrier coating when exposed to heat
iii. Coating performance prediction: Determination of the predominant performance degradation or complete dysfunctional mechanisms for the thermal coating.
2.2 TBC Characterization (Turbine - Electron Beam Physical Vapor Deposition (EB-PVD))
In the scope of the project; The thermal and mechanical property characterization of the thermal barrier coating which will be exposed to the high temperatures in the engine will be determined. Lack of metallurgical and operational experience regarding to the thermal barrier coating, limits the design and manufacturing capabilities. Therefore, the objective of this project will be the investigation of the mechanisms affecting the microstructure of the thermal barrier coating and to determine the functionality of the thermal barrier coating. In the scope of the project the EB-PVD method which apply on the turbine blades and that doesn't effects the aerodynamic flow will be investigated.
The inclusion of the work packages of the project is planned to be presented under the following main headings.
i. Characteristic determination: Determination of the measurable characteristics of the thermal barrier coating.
ii. Change of characteristic with heat: Determining the change in the characteristics of the thermal barrier coating when exposed to heat.
iii. Coating performance prediction: Determination of the predominant performance degradation or completely dysfunctional mechanisms for the thermal coating.
2.3 Obtaining Metallurgical Information
In the scope of turboshaft engine project, metallurgical information of the materials to be used in the design of the engine will be obtained. Tests required to obtain this information will be made in the
NADCAP certified test center.
In this project, by selecting one of the obtained data engine materials (titanium (6/4, 6242, etc.), Or super alloy (Inconel series, etc.)), and doing the required tests:
i. Thermal and physical tests: Poisson's ratio, thermal expansion,thermal release, thermal conductivity, density, specific heat determination tests
ii. Mechanical tests: tensile and yield strength, elongation values, high and low cycle fatigue strength, stress value tests
re-obtaining of the metallurgical information is planned (like validating the literature data). The obtained data will be compared with the data which will be obtained from NADCAP certified testing centers and obtaining of the material information capabilities / qualifications will be evaluated.
2.4 Titanium Forging Technology
The relationship between the production process and the material properties, of the titanium forged parts will be determined in the scope of the project.For the analysis and comparison of the forged titanium samples, different prototypes will be produced and optimum process parameters will be defined.
2.5 Nickel Based Superalloys Forging Technology
The relationship between the production process and the material properties, of the nickel-based superalloy forged parts will be determined in the scope of the project.For the analysis and comparison of the forged nickel-based superalloy samples, different prototypes will be produced and optimum process parameters will be defined.
Will continue with the
structural part of the project.
EB-PVD method is particullary interesting.
